20097913 has 8 divisors (see below), whose sum is σ = 22460256. Its totient is φ = 17824800.

The previous prime is 20097911. The next prime is 20097947. The reversal of 20097913 is 31979002.

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 20097913 - 2¹ = 20097911 is a prime.

It is a super-2 number, since 2×20097913² = 807852213911138, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20097911) 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, 21831 + ... + 22732.

It is an arithmetic number, because the mean of its divisors is an integer number (2807532).

Almost surely, 2^20097913 is an apocalyptic number.

It is an amenable number.

20097913 is a deficient number, since it is larger than the sum of its proper divisors (2362343).

20097913 is a wasteful number, since it uses less digits than its factorization.

20097913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44615.

The product of its (nonzero) digits is 3402, while the sum is 31.

The square root of 20097913 is about 4483.0695957123. The cubic root of 20097913 is about 271.8840020448.

The spelling of 20097913 in words is "twenty million, ninety-seven thousand, nine hundred thirteen".