20936683894 has 16 divisors (see below), whose sum is σ = 36261475488. Its totient is φ = 8880360192.

The previous prime is 20936683879. The next prime is 20936683903. The reversal of 20936683894 is 49838663902.

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, 7707289 + ... + 7710004.

It is an arithmetic number, because the mean of its divisors is an integer number (2266342218).

Almost surely, 2^20936683894 is an apocalyptic number.

20936683894 is a deficient number, since it is larger than the sum of its proper divisors (15324791594).

20936683894 is a wasteful number, since it uses less digits than its factorization.

20936683894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15417399.

The product of its (nonzero) digits is 13436928, while the sum is 58.

The spelling of 20936683894 in words is "twenty billion, nine hundred thirty-six million, six hundred eighty-three thousand, eight hundred ninety-four".