21400522626 has 32 divisors (see below), whose sum is σ = 49504831488. Its totient is φ = 6040766160.

The previous prime is 21400522621. The next prime is 21400522631. The reversal of 21400522626 is 62622500412.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (21400522621) and next prime (21400522631).

It is a junction number, because it is equal to n+sod(n) for n = 21400522593 and 21400522602.

It is not an unprimeable number, because it can be changed into a prime (21400522621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3066010 + ... + 3072981.

It is an arithmetic number, because the mean of its divisors is an integer number (1547025984).

Almost surely, 2^21400522626 is an apocalyptic number.

21400522626 is an abundant number, since it is smaller than the sum of its proper divisors (28104308862).

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

21400522626 is a wasteful number, since it uses less digits than its factorization.

21400522626 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6139086.

The product of its (nonzero) digits is 11520, while the sum is 30.

The spelling of 21400522626 in words is "twenty-one billion, four hundred million, five hundred twenty-two thousand, six hundred twenty-six".