21407316457024 has 56 divisors (see below), whose sum is σ = 43563172561568. Its totient is φ = 10431858447360.

The previous prime is 21407316456979. The next prime is 21407316457091. The reversal of 21407316457024 is 42075461370412.

It is a happy 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, 7253082 + ... + 9768409.

Almost surely, 2^{21407316457024} is an apocalyptic number.

It is an amenable number.

21407316457024 is an abundant number, since it is smaller than the sum of its proper divisors (22155856104544).

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

21407316457024 is a wasteful number, since it uses less digits than its factorization.

21407316457024 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17022003 (or 17021993 counting only the distinct ones).

The product of its (nonzero) digits is 1128960, while the sum is 46.

The spelling of 21407316457024 in words is "twenty-one trillion, four hundred seven billion, three hundred sixteen million, four hundred fifty-seven thousand, twenty-four".