21250225666368 has 84 divisors (see below), whose sum is σ = 62874771692928. Its totient is φ = 6854911499520.

The previous prime is 21250225666367. The next prime is 21250225666379. The reversal of 21250225666368 is 86366652205212.

It is a super-2 number, since 2×21250225666368² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21250225666367) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 595026546 + ... + 595062257.

Almost surely, 2^{21250225666368} is an apocalyptic number.

It is an amenable number.

21250225666368 is an abundant number, since it is smaller than the sum of its proper divisors (41624546026560).

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

21250225666368 is a wasteful number, since it uses less digits than its factorization.

21250225666368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1190088852 (or 1190088839 counting only the distinct ones).

The product of its (nonzero) digits is 12441600, while the sum is 54.

The spelling of 21250225666368 in words is "twenty-one trillion, two hundred fifty billion, two hundred twenty-five million, six hundred sixty-six thousand, three hundred sixty-eight".