20151913 has 8 divisors (see below), whose sum is σ = 21254400. Its totient is φ = 19053648.

The previous prime is 20151883. The next prime is 20151917. The reversal of 20151913 is 31915102.

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 20151913 - 2⁵ = 20151881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20151917) 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, 15783 + ... + 17011.

It is an arithmetic number, because the mean of its divisors is an integer number (2656800).

Almost surely, 2^20151913 is an apocalyptic number.

It is an amenable number.

20151913 is a deficient number, since it is larger than the sum of its proper divisors (1102487).

20151913 is a wasteful number, since it uses less digits than its factorization.

20151913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2111.

The product of its (nonzero) digits is 270, while the sum is 22.

The square root of 20151913 is about 4489.0882147715. The cubic root of 20151913 is about 272.1272877783.

The spelling of 20151913 in words is "twenty million, one hundred fifty-one thousand, nine hundred thirteen".