20354461636564 has 192 divisors, whose sum is σ = 42758632627200. Its totient is φ = 8376300979200.

The previous prime is 20354461636451. The next prime is 20354461636571. The reversal of 20354461636564 is 46563616445302.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2410804927 + ... + 2410813369.

It is an arithmetic number, because the mean of its divisors is an integer number (222701211600).

Almost surely, 2^{20354461636564} is an apocalyptic number.

It is an amenable number.

20354461636564 is an abundant number, since it is smaller than the sum of its proper divisors (22404170990636).

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

20354461636564 is a wasteful number, since it uses less digits than its factorization.

20354461636564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9894 (or 9892 counting only the distinct ones).

The product of its (nonzero) digits is 37324800, while the sum is 55.

The spelling of 20354461636564 in words is "twenty trillion, three hundred fifty-four billion, four hundred sixty-one million, six hundred thirty-six thousand, five hundred sixty-four".