20953493355 has 16 divisors (see below), whose sum is σ = 33595591680. Its totient is φ = 11151862368.

The previous prime is 20953493321. The next prime is 20953493383. The reversal of 20953493355 is 55339435902.

It is not a de Polignac number, because 20953493355 - 2⁶ = 20953493291 is a prime.

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, 1450957 + ... + 1465326.

It is an arithmetic number, because the mean of its divisors is an integer number (2099724480).

Almost surely, 2^20953493355 is an apocalyptic number.

20953493355 is a deficient number, since it is larger than the sum of its proper divisors (12642098325).

20953493355 is a wasteful number, since it uses less digits than its factorization.

20953493355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2916770.

The product of its (nonzero) digits is 2187000, while the sum is 48.

The spelling of 20953493355 in words is "twenty billion, nine hundred fifty-three million, four hundred ninety-three thousand, three hundred fifty-five".