21723540474364 has 12 divisors (see below), whose sum is σ = 38018712398184. Its totient is φ = 10861051217744.

The previous prime is 21723540474341. The next prime is 21723540474401. The reversal of 21723540474364 is 46347404532712.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 179686879 + ... + 179807734.

It is an arithmetic number, because the mean of its divisors is an integer number (3168226033182).

Almost surely, 2^{21723540474364} is an apocalyptic number.

It is an amenable number.

21723540474364 is a deficient number, since it is larger than the sum of its proper divisors (16295171923820).

21723540474364 is a wasteful number, since it uses less digits than its factorization.

21723540474364 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 359509724 (or 359509722 counting only the distinct ones).

The product of its (nonzero) digits is 13547520, while the sum is 52.

The spelling of 21723540474364 in words is "twenty-one trillion, seven hundred twenty-three billion, five hundred forty million, four hundred seventy-four thousand, three hundred sixty-four".