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19874138 = 247211427
BaseRepresentation
bin100101111010…
…0000101011010
31101101201012012
41023310011122
520041433023
61545545522
7330633044
oct113640532
941351165
1019874138
1110244809
1267a52a2
13416b05b
1428d4a94
151b28978
hex12f415a

19874138 has 8 divisors (see below), whose sum is σ = 30445632. Its totient is φ = 9725596.

The previous prime is 19874137. The next prime is 19874149. The reversal of 19874138 is 83147891.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×198741382 = 789962722486088, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 19874095 and 19874104.

It is not an unprimeable number, because it can be changed into a prime (19874137) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 105620 + ... + 105807.

It is an arithmetic number, because the mean of its divisors is an integer number (3805704).

Almost surely, 219874138 is an apocalyptic number.

19874138 is a deficient number, since it is larger than the sum of its proper divisors (10571494).

19874138 is a wasteful number, since it uses less digits than its factorization.

19874138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211476.

The product of its digits is 48384, while the sum is 41.

The square root of 19874138 is about 4458.0419468641. The cubic root of 19874138 is about 270.8711596450.

The spelling of 19874138 in words is "nineteen million, eight hundred seventy-four thousand, one hundred thirty-eight".

Divisors: 1 2 47 94 211427 422854 9937069 19874138