20953772670 has 32 divisors (see below), whose sum is σ = 51113469600. Its totient is φ = 5496071040.

The previous prime is 20953772669. The next prime is 20953772687. The reversal of 20953772670 is 7627735902.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5723245 + ... + 5726904.

It is an arithmetic number, because the mean of its divisors is an integer number (1597295925).

Almost surely, 2^20953772670 is an apocalyptic number.

20953772670 is an abundant number, since it is smaller than the sum of its proper divisors (30159696930).

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

20953772670 is a wasteful number, since it uses less digits than its factorization.

20953772670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11450220.

The product of its (nonzero) digits is 1111320, while the sum is 48.

The spelling of 20953772670 in words is "twenty billion, nine hundred fifty-three million, seven hundred seventy-two thousand, six hundred seventy".