20864379252 has 48 divisors (see below), whose sum is σ = 52438966272. Its totient is φ = 6437814240.

The previous prime is 20864379241. The next prime is 20864379253. The reversal of 20864379252 is 25297346802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20864379253) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 1210728 + ... + 1227839.

It is an arithmetic number, because the mean of its divisors is an integer number (1092478464).

Almost surely, 2^20864379252 is an apocalyptic number.

It is an amenable number.

20864379252 is an abundant number, since it is smaller than the sum of its proper divisors (31574587020).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20864379252 is a wasteful number, since it uses less digits than its factorization.

20864379252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2438628 (or 2438626 counting only the distinct ones).

The product of its (nonzero) digits is 1451520, while the sum is 48.

The spelling of 20864379252 in words is "twenty billion, eight hundred sixty-four million, three hundred seventy-nine thousand, two hundred fifty-two".