21656226251062 has 48 divisors (see below), whose sum is σ = 36837224422560. Its totient is φ = 9526092466176.

The previous prime is 21656226250979. The next prime is 21656226251071. The reversal of 21656226251062 is 26015262265612.

It is a super-2 number, since 2×21656226251062² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2874987 + ... + 7181782.

It is an arithmetic number, because the mean of its divisors is an integer number (767442175470).

Almost surely, 2^{21656226251062} is an apocalyptic number.

21656226251062 is a deficient number, since it is larger than the sum of its proper divisors (15180998171498).

21656226251062 is a wasteful number, since it uses less digits than its factorization.

21656226251062 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10057097 (or 10057084 counting only the distinct ones).

The product of its (nonzero) digits is 1036800, while the sum is 46.

The spelling of 21656226251062 in words is "twenty-one trillion, six hundred fifty-six billion, two hundred twenty-six million, two hundred fifty-one thousand, sixty-two".