21269444592 has 80 divisors (see below), whose sum is σ = 60501520512. Its totient is φ = 6385032960.

The previous prime is 21269444591. The next prime is 21269444597. The reversal of 21269444592 is 29544496212.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21269444591) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 131743 + ... + 244734.

Almost surely, 2^21269444592 is an apocalyptic number.

21269444592 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21269444592 is an abundant number, since it is smaller than the sum of its proper divisors (39232075920).

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

21269444592 is a wasteful number, since it uses less digits than its factorization.

21269444592 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 376606 (or 376600 counting only the distinct ones).

The product of its digits is 1244160, while the sum is 48.

The spelling of 21269444592 in words is "twenty-one billion, two hundred sixty-nine million, four hundred forty-four thousand, five hundred ninety-two".