20507727399 has 32 divisors (see below), whose sum is σ = 28387645440. Its totient is φ = 13159909728.

The previous prime is 20507727391. The next prime is 20507727403. The reversal of 20507727399 is 99372770502.

It is not a de Polignac number, because 20507727399 - 2³ = 20507727391 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20507727391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4698192 + ... + 4702554.

It is an arithmetic number, because the mean of its divisors is an integer number (887113920).

Almost surely, 2^20507727399 is an apocalyptic number.

20507727399 is a deficient number, since it is larger than the sum of its proper divisors (7879918041).

20507727399 is a wasteful number, since it uses less digits than its factorization.

20507727399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4931.

The product of its (nonzero) digits is 1666980, while the sum is 51.

The spelling of 20507727399 in words is "twenty billion, five hundred seven million, seven hundred twenty-seven thousand, three hundred ninety-nine".