21250225666292 has 24 divisors (see below), whose sum is σ = 42501202590336. Its totient is φ = 9107078587488.

The previous prime is 21250225666277. The next prime is 21250225666297. The reversal of 21250225666292 is 29266652205212.

It is a self number, because there is not a number n which added to its sum of digits gives 21250225666292.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21250225666297) 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, 5088488 + ... + 8270015.

It is an arithmetic number, because the mean of its divisors is an integer number (1770883441264).

Almost surely, 2^{21250225666292} is an apocalyptic number.

It is an amenable number.

21250225666292 is an abundant number, since it is smaller than the sum of its proper divisors (21250976924044).

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

21250225666292 is a wasteful number, since it uses less digits than its factorization.

21250225666292 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13415327 (or 13415325 counting only the distinct ones).

The product of its (nonzero) digits is 3110400, while the sum is 50.

The spelling of 21250225666292 in words is "twenty-one trillion, two hundred fifty billion, two hundred twenty-five million, six hundred sixty-six thousand, two hundred ninety-two".