20756757670 has 32 divisors (see below), whose sum is σ = 42903924480. Its totient is φ = 7150652640.

The previous prime is 20756757667. The next prime is 20756757683. The reversal of 20756757670 is 7675765702.

It is a super-2 number, since 2×20756757670² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4963642 + ... + 4967821.

It is an arithmetic number, because the mean of its divisors is an integer number (1340747640).

Almost surely, 2^20756757670 is an apocalyptic number.

20756757670 is an abundant number, since it is smaller than the sum of its proper divisors (22147166810).

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

20756757670 is a wasteful number, since it uses less digits than its factorization.

20756757670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9931500.

The product of its (nonzero) digits is 4321800, while the sum is 52.

The spelling of 20756757670 in words is "twenty billion, seven hundred fifty-six million, seven hundred fifty-seven thousand, six hundred seventy".