22737221640 has 160 divisors (see below), whose sum is σ = 87339890880. Its totient is φ = 5197074048.

The previous prime is 22737221623. The next prime is 22737221651. The reversal of 22737221640 is 4612273722.

It is a happy number.

22737221640 is a `hidden beast` number, since 2 + 2 + 7 + 3 + 7 + 2 + 2 + 1 + 640 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 22737221595 and 22737221604.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 478582 + ... + 523941.

It is an arithmetic number, because the mean of its divisors is an integer number (545874318).

Almost surely, 2^22737221640 is an apocalyptic number.

22737221640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22737221640 is an abundant number, since it is smaller than the sum of its proper divisors (64602669240).

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

22737221640 is a wasteful number, since it uses less digits than its factorization.

22737221640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1002553 (or 1002540 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 36.

The spelling of 22737221640 in words is "twenty-two billion, seven hundred thirty-seven million, two hundred twenty-one thousand, six hundred forty".