21083426724 has 48 divisors (see below), whose sum is σ = 52218565056. Its totient is φ = 6597888000.

The previous prime is 21083426717. The next prime is 21083426773. The reversal of 21083426724 is 42762438012.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47062 + ... + 210669.

It is an arithmetic number, because the mean of its divisors is an integer number (1087886772).

Almost surely, 2^21083426724 is an apocalyptic number.

It is an amenable number.

21083426724 is an abundant number, since it is smaller than the sum of its proper divisors (31135138332).

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

21083426724 is a wasteful number, since it uses less digits than its factorization.

21083426724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258156 (or 258154 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 39.

The spelling of 21083426724 in words is "twenty-one billion, eighty-three million, four hundred twenty-six thousand, seven hundred twenty-four".