20865882831 has 8 divisors (see below), whose sum is σ = 29030793600. Its totient is φ = 13305780312.

The previous prime is 20865882809. The next prime is 20865882847. The reversal of 20865882831 is 13828856802.

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

It is not a de Polignac number, because 20865882831 - 2⁶ = 20865882767 is a prime.

It is a super-2 number, since 2×20865882831² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20865889831) 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, 151201981 + ... + 151202118.

It is an arithmetic number, because the mean of its divisors is an integer number (3628849200).

Almost surely, 2^20865882831 is an apocalyptic number.

20865882831 is a deficient number, since it is larger than the sum of its proper divisors (8164910769).

20865882831 is a wasteful number, since it uses less digits than its factorization.

20865882831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 302404125.

The product of its (nonzero) digits is 1474560, while the sum is 51.

The spelling of 20865882831 in words is "twenty billion, eight hundred sixty-five million, eight hundred eighty-two thousand, eight hundred thirty-one".