21115053254 has 16 divisors (see below), whose sum is σ = 32226333216. Its totient is φ = 10373313600.

The previous prime is 21115053227. The next prime is 21115053277. The reversal of 21115053254 is 45235051112.

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 7 ways as a sum of consecutive naturals, for example, 21959 + ... + 206669.

It is an arithmetic number, because the mean of its divisors is an integer number (2014145826).

Almost surely, 2^21115053254 is an apocalyptic number.

21115053254 is a deficient number, since it is larger than the sum of its proper divisors (11111279962).

21115053254 is a wasteful number, since it uses less digits than its factorization.

21115053254 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185711.

The product of its (nonzero) digits is 6000, while the sum is 29.

The spelling of 21115053254 in words is "twenty-one billion, one hundred fifteen million, fifty-three thousand, two hundred fifty-four".