21272339494 has 16 divisors (see below), whose sum is σ = 36480503808. Its totient is φ = 9113307912.

The previous prime is 21272339489. The next prime is 21272339507. The reversal of 21272339494 is 49493327212.

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, 245124 + ... + 320359.

It is an arithmetic number, because the mean of its divisors is an integer number (2280031488).

Almost surely, 2^21272339494 is an apocalyptic number.

21272339494 is a deficient number, since it is larger than the sum of its proper divisors (15208164314).

21272339494 is a wasteful number, since it uses less digits than its factorization.

21272339494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 568179.

The product of its digits is 653184, while the sum is 46.

The spelling of 21272339494 in words is "twenty-one billion, two hundred seventy-two million, three hundred thirty-nine thousand, four hundred ninety-four".