20874734799 has 16 divisors (see below), whose sum is σ = 28052463360. Its totient is φ = 13806866880.

The previous prime is 20874734791. The next prime is 20874734801. The reversal of 20874734799 is 99743747802.

It is not a de Polignac number, because 20874734799 - 2³ = 20874734791 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20874734791) 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, 738672 + ... + 766410.

It is an arithmetic number, because the mean of its divisors is an integer number (1753278960).

Almost surely, 2^20874734799 is an apocalyptic number.

20874734799 is a deficient number, since it is larger than the sum of its proper divisors (7177728561).

20874734799 is a wasteful number, since it uses less digits than its factorization.

20874734799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29710.

The product of its (nonzero) digits is 21337344, while the sum is 60.

The spelling of 20874734799 in words is "twenty billion, eight hundred seventy-four million, seven hundred thirty-four thousand, seven hundred ninety-nine".