20013730766505 has 48 divisors (see below), whose sum is σ = 39670616329344. Its totient is φ = 9143510515200.

The previous prime is 20013730766483. The next prime is 20013730766527. The reversal of 20013730766505 is 50566703731002.

20013730766505 is a `hidden beast` number, since 2 + 0 + 0 + 1 + 3 + 73 + 0 + 76 + 6 + 505 = 666.

It is an interprime number because it is at equal distance from previous prime (20013730766483) and next prime (20013730766527).

It is not a de Polignac number, because 20013730766505 - 2¹² = 20013730762409 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 19012896 + ... + 20037905.

It is an arithmetic number, because the mean of its divisors is an integer number (826471173528).

Almost surely, 2^{20013730766505} is an apocalyptic number.

It is an amenable number.

20013730766505 is a deficient number, since it is larger than the sum of its proper divisors (19656885562839).

20013730766505 is a wasteful number, since it uses less digits than its factorization.

20013730766505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39052446 (or 39052443 counting only the distinct ones).

The product of its (nonzero) digits is 793800, while the sum is 45.

The spelling of 20013730766505 in words is "twenty trillion, thirteen billion, seven hundred thirty million, seven hundred sixty-six thousand, five hundred five".