21255025334 has 16 divisors (see below), whose sum is σ = 32338758816. Its totient is φ = 10475505600.

The previous prime is 21255025333. The next prime is 21255025343. The reversal of 21255025334 is 43352055212.

It is a super-2 number, since 2×21255025334² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21255025334.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21255025333) 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, 750194 + ... + 778010.

It is an arithmetic number, because the mean of its divisors is an integer number (2021172426).

Almost surely, 2^21255025334 is an apocalyptic number.

21255025334 is a deficient number, since it is larger than the sum of its proper divisors (11083733482).

21255025334 is a wasteful number, since it uses less digits than its factorization.

21255025334 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33271.

The product of its (nonzero) digits is 36000, while the sum is 32.

The spelling of 21255025334 in words is "twenty-one billion, two hundred fifty-five million, twenty-five thousand, three hundred thirty-four".