20857731124 has 24 divisors (see below), whose sum is σ = 36680878080. Its totient is φ = 10377607584.

The previous prime is 20857731119. The next prime is 20857731133. The reversal of 20857731124 is 42113775802.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 657042 + ... + 688054.

It is an arithmetic number, because the mean of its divisors is an integer number (1528369920).

Almost surely, 2^20857731124 is an apocalyptic number.

It is an amenable number.

20857731124 is a deficient number, since it is larger than the sum of its proper divisors (15823146956).

20857731124 is a wasteful number, since it uses less digits than its factorization.

20857731124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31839 (or 31837 counting only the distinct ones).

The product of its (nonzero) digits is 94080, while the sum is 40.

The spelling of 20857731124 in words is "twenty billion, eight hundred fifty-seven million, seven hundred thirty-one thousand, one hundred twenty-four".