19772113 has 8 divisors (see below), whose sum is σ = 20791080. Its totient is φ = 18775680.

The previous prime is 19772069. The next prime is 19772149. The reversal of 19772113 is 31127791.

It can be written as a sum of positive squares in 4 ways, for example, as 1896129 + 17875984 = 1377^2 + 4228^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 19772113 - 2⁹ = 19771601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19772153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3820 + ... + 7357.

It is an arithmetic number, because the mean of its divisors is an integer number (2598885).

Almost surely, 2^19772113 is an apocalyptic number.

It is an amenable number.

19772113 is a deficient number, since it is larger than the sum of its proper divisors (1018967).

19772113 is a wasteful number, since it uses less digits than its factorization.

19772113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11267.

The product of its digits is 2646, while the sum is 31.

The square root of 19772113 is about 4446.5844195292. The cubic root of 19772113 is about 270.4068534685.

The spelling of 19772113 in words is "nineteen million, seven hundred seventy-two thousand, one hundred thirteen".