20009874774465 has 24 divisors (see below), whose sum is σ = 34688158959168. Its totient is φ = 10670586746400.

The previous prime is 20009874774413. The next prime is 20009874774467. The reversal of 20009874774465 is 56447747890002.

20009874774465 is a `hidden beast` number, since 20 + 0 + 0 + 9 + 87 + 4 + 7 + 74 + 465 = 666.

It is not a de Polignac number, because 20009874774465 - 2¹⁸ = 20009874512321 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20009874774467) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 27690711 + ... + 28404140.

It is an arithmetic number, because the mean of its divisors is an integer number (1445339956632).

Almost surely, 2^{20009874774465} is an apocalyptic number.

It is an amenable number.

20009874774465 is a deficient number, since it is larger than the sum of its proper divisors (14678284184703).

20009874774465 is a wasteful number, since it uses less digits than its factorization.

20009874774465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56102789 (or 56102786 counting only the distinct ones).

The product of its (nonzero) digits is 94832640, while the sum is 63.

The spelling of 20009874774465 in words is "twenty trillion, nine billion, eight hundred seventy-four million, seven hundred seventy-four thousand, four hundred sixty-five".