20901097831 has 8 divisors (see below), whose sum is σ = 22188363264. Its totient is φ = 19620253440.

The previous prime is 20901097817. The next prime is 20901097843. The reversal of 20901097831 is 13879010902.

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 20901097831 - 2¹⁹ = 20900573543 is a prime.

It is a super-2 number, since 2×20901097831² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20901097871) 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, 1598550 + ... + 1611571.

It is an arithmetic number, because the mean of its divisors is an integer number (2773545408).

Almost surely, 2^20901097831 is an apocalyptic number.

20901097831 is a deficient number, since it is larger than the sum of its proper divisors (1287265433).

20901097831 is a wasteful number, since it uses less digits than its factorization.

20901097831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3210521.

The product of its (nonzero) digits is 27216, while the sum is 40.

The spelling of 20901097831 in words is "twenty billion, nine hundred one million, ninety-seven thousand, eight hundred thirty-one".