20953982170 has 32 divisors (see below), whose sum is σ = 41553409536. Its totient is φ = 7544184000.

The previous prime is 20953982167. The next prime is 20953982237. The reversal of 20953982170 is 7128935902.

It is a self number, because there is not a number n which added to its sum of digits gives 20953982170.

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 15 ways as a sum of consecutive naturals, for example, 931914 + ... + 954133.

It is an arithmetic number, because the mean of its divisors is an integer number (1298544048).

Almost surely, 2^20953982170 is an apocalyptic number.

20953982170 is a deficient number, since it is larger than the sum of its proper divisors (20599427366).

20953982170 is a wasteful number, since it uses less digits than its factorization.

20953982170 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1886166.

The product of its (nonzero) digits is 272160, while the sum is 46.

The spelling of 20953982170 in words is "twenty billion, nine hundred fifty-three million, nine hundred eighty-two thousand, one hundred seventy".