21269004944 has 20 divisors (see below), whose sum is σ = 44954942640. Its totient is φ = 9667729440.

The previous prime is 21269004943. The next prime is 21269004949. The reversal of 21269004944 is 44940096212.

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (21269004941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60423134 + ... + 60423485.

It is an arithmetic number, because the mean of its divisors is an integer number (2247747132).

Almost surely, 2^21269004944 is an apocalyptic number.

It is an amenable number.

21269004944 is an abundant number, since it is smaller than the sum of its proper divisors (23685937696).

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

21269004944 is a wasteful number, since it uses less digits than its factorization.

21269004944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120846638 (or 120846632 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 41.

The spelling of 21269004944 in words is "twenty-one billion, two hundred sixty-nine million, four thousand, nine hundred forty-four".