20913175955 has 16 divisors (see below), whose sum is σ = 28690377984. Its totient is φ = 14335738080.

The previous prime is 20913175951. The next prime is 20913175967. The reversal of 20913175955 is 55957131902.

It is a happy number.

It is not a de Polignac number, because 20913175955 - 2² = 20913175951 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20913175951) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11000 + ... + 204810.

It is an arithmetic number, because the mean of its divisors is an integer number (1793148624).

Almost surely, 2^20913175955 is an apocalyptic number.

20913175955 is a deficient number, since it is larger than the sum of its proper divisors (7777202029).

20913175955 is a wasteful number, since it uses less digits than its factorization.

20913175955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196906.

The product of its (nonzero) digits is 425250, while the sum is 47.

The spelling of 20913175955 in words is "twenty billion, nine hundred thirteen million, one hundred seventy-five thousand, nine hundred fifty-five".