20931082634 has 48 divisors (see below), whose sum is σ = 40712759808. Its totient is φ = 7891884000.

The previous prime is 20931082631. The next prime is 20931082639. The reversal of 20931082634 is 43628013902.

It is a super-2 number, since 2×20931082634² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20931082631) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 146777 + ... + 251804.

It is an arithmetic number, because the mean of its divisors is an integer number (848182496).

Almost surely, 2^20931082634 is an apocalyptic number.

20931082634 is a deficient number, since it is larger than the sum of its proper divisors (19781677174).

20931082634 is a wasteful number, since it uses less digits than its factorization.

20931082634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 398643 (or 398632 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 38.

The spelling of 20931082634 in words is "twenty billion, nine hundred thirty-one million, eighty-two thousand, six hundred thirty-four".