20957049952 has 12 divisors (see below), whose sum is σ = 41259192156. Its totient is φ = 10478524960.

The previous prime is 20957049937. The next prime is 20957049959. The reversal of 20957049952 is 25994075902.

It is a self number, because there is not a number n which added to its sum of digits gives 20957049952.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20957049959) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 327453874 + ... + 327453937.

It is an arithmetic number, because the mean of its divisors is an integer number (3438266013).

Almost surely, 2^20957049952 is an apocalyptic number.

It is an amenable number.

20957049952 is a deficient number, since it is larger than the sum of its proper divisors (20302142204).

20957049952 is an equidigital number, since it uses as much as digits as its factorization.

20957049952 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 654907821 (or 654907813 counting only the distinct ones).

The product of its (nonzero) digits is 2041200, while the sum is 52.

The spelling of 20957049952 in words is "twenty billion, nine hundred fifty-seven million, forty-nine thousand, nine hundred fifty-two".