21425602681504 has 96 divisors (see below), whose sum is σ = 49119518883456. Its totient is φ = 9008719948800.

The previous prime is 21425602681463. The next prime is 21425602681541. The reversal of 21425602681504 is 40518620652412.

It is a super-3 number, since 3×21425602681504³ (a number of 41 digits) contains 333 as substring.

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, 438064219 + ... + 438113125.

It is an arithmetic number, because the mean of its divisors is an integer number (511661655036).

Almost surely, 2^{21425602681504} is an apocalyptic number.

It is an amenable number.

21425602681504 is an abundant number, since it is smaller than the sum of its proper divisors (27693916201952).

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

21425602681504 is a wasteful number, since it uses less digits than its factorization.

21425602681504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85878 (or 85870 counting only the distinct ones).

The product of its (nonzero) digits is 921600, while the sum is 46.

The spelling of 21425602681504 in words is "twenty-one trillion, four hundred twenty-five billion, six hundred two million, six hundred eighty-one thousand, five hundred four".