21255602733344 has 48 divisors (see below), whose sum is σ = 47825982001728. Its totient is φ = 9109377199872.

The previous prime is 21255602733341. The next prime is 21255602733413. The reversal of 21255602733344 is 44333720655212.

It is not an unprimeable number, because it can be changed into a prime (21255602733341) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11801207 + ... + 13482569.

It is an arithmetic number, because the mean of its divisors is an integer number (996374625036).

Almost surely, 2^{21255602733344} is an apocalyptic number.

It is an amenable number.

21255602733344 is an abundant number, since it is smaller than the sum of its proper divisors (26570379268384).

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

21255602733344 is a wasteful number, since it uses less digits than its factorization.

21255602733344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1737817 (or 1737809 counting only the distinct ones).

The product of its (nonzero) digits is 3628800, while the sum is 47.

The spelling of 21255602733344 in words is "twenty-one trillion, two hundred fifty-five billion, six hundred two million, seven hundred thirty-three thousand, three hundred forty-four".