20986077760511 has 16 divisors (see below), whose sum is σ = 22600390348800. Its totient is φ = 19414064677248.

The previous prime is 20986077760507. The next prime is 20986077760541. The reversal of 20986077760511 is 11506777068902.

It is not a de Polignac number, because 20986077760511 - 2² = 20986077760507 is a prime.

It is a super-2 number, since 2×20986077760511² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (59).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20986077760541) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5573876 + ... + 8546358.

It is an arithmetic number, because the mean of its divisors is an integer number (1412524396800).

Almost surely, 2^{20986077760511} is an apocalyptic number.

20986077760511 is a deficient number, since it is larger than the sum of its proper divisors (1614312588289).

20986077760511 is a wasteful number, since it uses less digits than its factorization.

20986077760511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2979598.

The product of its (nonzero) digits is 8890560, while the sum is 59.

The spelling of 20986077760511 in words is "twenty trillion, nine hundred eighty-six billion, seventy-seven million, seven hundred sixty thousand, five hundred eleven".