21293939312 has 40 divisors (see below), whose sum is σ = 43740950400. Its totient is φ = 10014017472.

The previous prime is 21293939309. The next prime is 21293939323. The reversal of 21293939312 is 21393939212.

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, 209708 + ... + 294219.

It is an arithmetic number, because the mean of its divisors is an integer number (1093523760).

Almost surely, 2^21293939312 is an apocalyptic number.

It is an amenable number.

21293939312 is an abundant number, since it is smaller than the sum of its proper divisors (22447011088).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21293939312 is a wasteful number, since it uses less digits than its factorization.

21293939312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 504093 (or 504087 counting only the distinct ones).

The product of its digits is 157464, while the sum is 44.

The spelling of 21293939312 in words is "twenty-one billion, two hundred ninety-three million, nine hundred thirty-nine thousand, three hundred twelve".