20831676631 has 4 divisors (see below), whose sum is σ = 22057069392. Its totient is φ = 19606283872.

The previous prime is 20831676623. The next prime is 20831676667. The reversal of 20831676631 is 13667613802.

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

It is not a de Polignac number, because 20831676631 - 2³ = 20831676623 is a prime.

It is a super-2 number, since 2×20831676631² (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 (20831676031) 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, 612696355 + ... + 612696388.

It is an arithmetic number, because the mean of its divisors is an integer number (5514267348).

Almost surely, 2^20831676631 is an apocalyptic number.

20831676631 is a deficient number, since it is larger than the sum of its proper divisors (1225392761).

20831676631 is a wasteful number, since it uses less digits than its factorization.

20831676631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1225392760.

The product of its (nonzero) digits is 217728, while the sum is 43.

The spelling of 20831676631 in words is "twenty billion, eight hundred thirty-one million, six hundred seventy-six thousand, six hundred thirty-one".