21226540452524 has 24 divisors (see below), whose sum is σ = 40580551174800. Its totient is φ = 9634818962880.

The previous prime is 21226540452517. The next prime is 21226540452553. The reversal of 21226540452524 is 42525404562212.

It is a Harshad number since it is a multiple of its sum of digits (44).

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, 340181339 + ... + 340243730.

It is an arithmetic number, because the mean of its divisors is an integer number (1690856298950).

Almost surely, 2^{21226540452524} is an apocalyptic number.

It is an amenable number.

21226540452524 is a deficient number, since it is larger than the sum of its proper divisors (19354010722276).

21226540452524 is a wasteful number, since it uses less digits than its factorization.

21226540452524 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 680425793 (or 680425791 counting only the distinct ones).

The product of its (nonzero) digits is 1536000, while the sum is 44.

The spelling of 21226540452524 in words is "twenty-one trillion, two hundred twenty-six billion, five hundred forty million, four hundred fifty-two thousand, five hundred twenty-four".