21770757960 has 128 divisors (see below), whose sum is σ = 74673204480. Its totient is φ = 4974133248.

The previous prime is 21770757937. The next prime is 21770758001. The reversal of 21770757960 is 6975707712.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3182704 + ... + 3189536.

It is an arithmetic number, because the mean of its divisors is an integer number (583384410).

Almost surely, 2^21770757960 is an apocalyptic number.

21770757960 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21770757960 is an abundant number, since it is smaller than the sum of its proper divisors (52902446520).

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

21770757960 is a wasteful number, since it uses less digits than its factorization.

21770757960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10647 (or 10643 counting only the distinct ones).

The product of its (nonzero) digits is 1296540, while the sum is 51.

The spelling of 21770757960 in words is "twenty-one billion, seven hundred seventy million, seven hundred fifty-seven thousand, nine hundred sixty".