21403089892 has 6 divisors (see below), whose sum is σ = 37455407318. Its totient is φ = 10701544944.

The previous prime is 21403089887. The next prime is 21403089937. The reversal of 21403089892 is 29898030412.

It can be written as a sum of positive squares in only one way, i.e., 10988070976 + 10415018916 = 104824^2 + 102054^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2675386233 + ... + 2675386240.

Almost surely, 2^21403089892 is an apocalyptic number.

It is an amenable number.

21403089892 is a deficient number, since it is larger than the sum of its proper divisors (16052317426).

21403089892 is a wasteful number, since it uses less digits than its factorization.

21403089892 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5350772477 (or 5350772475 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 46.

The spelling of 21403089892 in words is "twenty-one billion, four hundred three million, eighty-nine thousand, eight hundred ninety-two".