21403831404 has 24 divisors (see below), whose sum is σ = 50009874880. Its totient is φ = 7124953104.

The previous prime is 21403831357. The next prime is 21403831411. The reversal of 21403831404 is 40413830412.

It is a super-2 number, since 2×21403831404² (a number of 21 digits) contains 22 as substring.

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, 1197934 + ... + 1215669.

Almost surely, 2^21403831404 is an apocalyptic number.

It is an amenable number.

21403831404 is an abundant number, since it is smaller than the sum of its proper divisors (28606043476).

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

21403831404 is a wasteful number, since it uses less digits than its factorization.

21403831404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2414349 (or 2414347 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 30.

The spelling of 21403831404 in words is "twenty-one billion, four hundred three million, eight hundred thirty-one thousand, four hundred four".