20561920298060 has 24 divisors (see below), whose sum is σ = 43180332567120. Its totient is φ = 8224710987584.

The previous prime is 20561920298041. The next prime is 20561920298201. The reversal of 20561920298060 is 6089202916502.

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, 557495 + ... + 6436974.

It is an arithmetic number, because the mean of its divisors is an integer number (1799180523630).

Almost surely, 2^{20561920298060} is an apocalyptic number.

20561920298060 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20561920298060 is an abundant number, since it is smaller than the sum of its proper divisors (22618412269060).

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

20561920298060 is a wasteful number, since it uses less digits than its factorization.

20561920298060 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7141465 (or 7141463 counting only the distinct ones).

The product of its (nonzero) digits is 933120, while the sum is 50.

The spelling of 20561920298060 in words is "twenty trillion, five hundred sixty-one billion, nine hundred twenty million, two hundred ninety-eight thousand, sixty".