21660536524602 has 16 divisors (see below), whose sum is σ = 43321270904352. Its totient is φ = 7220145865680.

The previous prime is 21660536524589. The next prime is 21660536524619. The reversal of 21660536524602 is 20642563506612.

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, 6801348 + ... + 9464639.

It is an arithmetic number, because the mean of its divisors is an integer number (2707579431522).

Almost surely, 2^{21660536524602} is an apocalyptic number.

21660536524602 is an abundant number, since it is smaller than the sum of its proper divisors (21660734379750).

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

21660536524602 is a wasteful number, since it uses less digits than its factorization.

21660536524602 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16487933.

The product of its (nonzero) digits is 3110400, while the sum is 48.

The spelling of 21660536524602 in words is "twenty-one trillion, six hundred sixty billion, five hundred thirty-six million, five hundred twenty-four thousand, six hundred two".