19903089 has 8 divisors (see below), whose sum is σ = 27934240. Its totient is φ = 12570336.

The previous prime is 19903069. The next prime is 19903097. The reversal of 19903089 is 98030991.

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

It is not a de Polignac number, because 19903089 - 2⁵ = 19903057 is a prime.

It is a super-2 number, since 2×19903089² = 792265903483842, which contains 22 as substring.

It is a Duffinian number.

It is a zygodrome in base 7.

It is not an unprimeable number, because it can be changed into a prime (19903069) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 174532 + ... + 174645.

It is an arithmetic number, because the mean of its divisors is an integer number (3491780).

Almost surely, 2^19903089 is an apocalyptic number.

19903089 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

19903089 is a deficient number, since it is larger than the sum of its proper divisors (8031151).

19903089 is a wasteful number, since it uses less digits than its factorization.

19903089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 349199.

The product of its (nonzero) digits is 17496, while the sum is 39.

The square root of 19903089 is about 4461.2878185564. The cubic root of 19903089 is about 271.0026233957.

The spelling of 19903089 in words is "nineteen million, nine hundred three thousand, eighty-nine".