20881853044 has 24 divisors (see below), whose sum is σ = 39359500488. Its totient is φ = 9636495360.

The previous prime is 20881853033. The next prime is 20881853051. The reversal of 20881853044 is 44035818802.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1173062500 + 19708790544 = 34250^2 + 140388^2 .

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, 447924 + ... + 492340.

It is an arithmetic number, because the mean of its divisors is an integer number (1639979187).

Almost surely, 2^20881853044 is an apocalyptic number.

It is an amenable number.

20881853044 is a deficient number, since it is larger than the sum of its proper divisors (18477647444).

20881853044 is a wasteful number, since it uses less digits than its factorization.

20881853044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53475 (or 53473 counting only the distinct ones).

The product of its (nonzero) digits is 245760, while the sum is 43.

The spelling of 20881853044 in words is "twenty billion, eight hundred eighty-one million, eight hundred fifty-three thousand, forty-four".