20621576106512 has 10 divisors (see below), whose sum is σ = 39954303706398. Its totient is φ = 10310788053248.

The previous prime is 20621576106503. The next prime is 20621576106559. The reversal of 20621576106512 is 21560167512602.

It can be written as a sum of positive squares in only one way, i.e., 17310792069376 + 3310784037136 = 4160624^2 + 1819556^2 .

It is a super-2 number, since 2×20621576106512² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 644424253313 + ... + 644424253344.

Almost surely, 2^{20621576106512} is an apocalyptic number.

It is an amenable number.

20621576106512 is a deficient number, since it is larger than the sum of its proper divisors (19332727599886).

20621576106512 is a wasteful number, since it uses less digits than its factorization.

20621576106512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1288848506665 (or 1288848506659 counting only the distinct ones).

The product of its (nonzero) digits is 302400, while the sum is 44.

The spelling of 20621576106512 in words is "twenty trillion, six hundred twenty-one billion, five hundred seventy-six million, one hundred six thousand, five hundred twelve".