21293338886 has 4 divisors (see below), whose sum is σ = 31940008332. Its totient is φ = 10646669442.

The previous prime is 21293338879. The next prime is 21293338907. The reversal of 21293338886 is 68883339212.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5323334720 + ... + 5323334723.

It is an arithmetic number, because the mean of its divisors is an integer number (7985002083).

Almost surely, 2^21293338886 is an apocalyptic number.

21293338886 is a deficient number, since it is larger than the sum of its proper divisors (10646669446).

21293338886 is a wasteful number, since it uses less digits than its factorization.

21293338886 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10646669445.

The product of its digits is 2985984, while the sum is 53.

The spelling of 21293338886 in words is "twenty-one billion, two hundred ninety-three million, three hundred thirty-eight thousand, eight hundred eighty-six".