19907113 has 4 divisors (see below), whose sum is σ = 19971028. Its totient is φ = 19843200.

The previous prime is 19907093. The next prime is 19907141. The reversal of 19907113 is 31170991.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7601049 + 12306064 = 2757^2 + 3508^2 .

It is a cyclic number.

It is not a de Polignac number, because 19907113 - 2⁵ = 19907081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19907143) 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, 31488 + ... + 32113.

It is an arithmetic number, because the mean of its divisors is an integer number (4992757).

Almost surely, 2^19907113 is an apocalyptic number.

It is an amenable number.

19907113 is a deficient number, since it is larger than the sum of its proper divisors (63915).

19907113 is an equidigital number, since it uses as much as digits as its factorization.

19907113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63914.

The product of its (nonzero) digits is 1701, while the sum is 31.

The square root of 19907113 is about 4461.7387866167. The cubic root of 19907113 is about 271.0208859054.

The spelling of 19907113 in words is "nineteen million, nine hundred seven thousand, one hundred thirteen".