20436727465 has 32 divisors (see below), whose sum is σ = 32184714240. Its totient is φ = 12069259200.

The previous prime is 20436727457. The next prime is 20436727481. The reversal of 20436727465 is 56472763402.

It is not a de Polignac number, because 20436727465 - 2³ = 20436727457 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1389591 + ... + 1404220.

It is an arithmetic number, because the mean of its divisors is an integer number (1005772320).

Almost surely, 2^20436727465 is an apocalyptic number.

It is an amenable number.

20436727465 is a deficient number, since it is larger than the sum of its proper divisors (11747986775).

20436727465 is a wasteful number, since it uses less digits than its factorization.

20436727465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2793853.

The product of its (nonzero) digits is 1693440, while the sum is 46.

The spelling of 20436727465 in words is "twenty billion, four hundred thirty-six million, seven hundred twenty-seven thousand, four hundred sixty-five".