21622361640 has 128 divisors (see below), whose sum is σ = 73840896000. Its totient is φ = 5013873920.

The previous prime is 21622361567. The next prime is 21622361669. The reversal of 21622361640 is 4616322612.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 325740 + ... + 386459.

It is an arithmetic number, because the mean of its divisors is an integer number (576882000).

Almost surely, 2^21622361640 is an apocalyptic number.

21622361640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21622361640 is an abundant number, since it is smaller than the sum of its proper divisors (52218534360).

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

21622361640 is a wasteful number, since it uses less digits than its factorization.

21622361640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 712247 (or 712243 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 33.

The spelling of 21622361640 in words is "twenty-one billion, six hundred twenty-two million, three hundred sixty-one thousand, six hundred forty".