21770757948 has 24 divisors (see below), whose sum is σ = 51020268880. Its totient is φ = 7225228800.

The previous prime is 21770757937. The next prime is 21770758001. The reversal of 21770757948 is 84975707712.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3958453 + ... + 3963948.

Almost surely, 2^21770757948 is an apocalyptic number.

It is an amenable number.

21770757948 is an abundant number, since it is smaller than the sum of its proper divisors (29249510932).

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

21770757948 is a wasteful number, since it uses less digits than its factorization.

21770757948 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7922637 (or 7922635 counting only the distinct ones).

The product of its (nonzero) digits is 6914880, while the sum is 57.

The spelling of 21770757948 in words is "twenty-one billion, seven hundred seventy million, seven hundred fifty-seven thousand, nine hundred forty-eight".