21746813496 has 16 divisors (see below), whose sum is σ = 54367033800. Its totient is φ = 7248937824.

The previous prime is 21746813449. The next prime is 21746813497. The reversal of 21746813496 is 69431864712.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21746813497) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 453058591 + ... + 453058638.

Almost surely, 2^21746813496 is an apocalyptic number.

It is an amenable number.

21746813496 is an abundant number, since it is smaller than the sum of its proper divisors (32620220304).

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

21746813496 is a wasteful number, since it uses less digits than its factorization.

21746813496 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 906117238 (or 906117234 counting only the distinct ones).

The product of its digits is 1741824, while the sum is 51.

The spelling of 21746813496 in words is "twenty-one billion, seven hundred forty-six million, eight hundred thirteen thousand, four hundred ninety-six".