21264222125624 has 32 divisors (see below), whose sum is σ = 40849651814400. Its totient is φ = 10372436404320.

The previous prime is 21264222125611. The next prime is 21264222125633. The reversal of 21264222125624 is 42652122246212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 90805544 + ... + 91039415.

It is an arithmetic number, because the mean of its divisors is an integer number (1276551619200).

Almost surely, 2^{21264222125624} is an apocalyptic number.

It is an amenable number.

21264222125624 is a deficient number, since it is larger than the sum of its proper divisors (19585429688776).

21264222125624 is a wasteful number, since it uses less digits than its factorization.

21264222125624 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181845323 (or 181845319 counting only the distinct ones).

The product of its digits is 368640, while the sum is 41.

The spelling of 21264222125624 in words is "twenty-one trillion, two hundred sixty-four billion, two hundred twenty-two million, one hundred twenty-five thousand, six hundred twenty-four".