21420207618124 has 48 divisors (see below), whose sum is σ = 43446193136640. Its totient is φ = 9050293667520.

The previous prime is 21420207618101. The next prime is 21420207618149. The reversal of 21420207618124 is 42181670202412.

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, 37001697 + ... + 37576135.

It is an arithmetic number, because the mean of its divisors is an integer number (905129023680).

Almost surely, 2^{21420207618124} is an apocalyptic number.

It is an amenable number.

21420207618124 is an abundant number, since it is smaller than the sum of its proper divisors (22025985518516).

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

21420207618124 is a wasteful number, since it uses less digits than its factorization.

21420207618124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 593278 (or 593276 counting only the distinct ones).

The product of its (nonzero) digits is 86016, while the sum is 40.

The spelling of 21420207618124 in words is "twenty-one trillion, four hundred twenty billion, two hundred seven million, six hundred eighteen thousand, one hundred twenty-four".