20553415879 has 8 divisors (see below), whose sum is σ = 20914866000. Its totient is φ = 20192402112.

The previous prime is 20553415843. The next prime is 20553415913. The reversal of 20553415879 is 97851435502.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20553415879 - 2²⁹ = 20016544967 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20553410879) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13324 + ... + 203185.

It is an arithmetic number, because the mean of its divisors is an integer number (2614358250).

Almost surely, 2^20553415879 is an apocalyptic number.

20553415879 is a deficient number, since it is larger than the sum of its proper divisors (361450121).

20553415879 is a wasteful number, since it uses less digits than its factorization.

20553415879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218177.

The product of its (nonzero) digits is 1512000, while the sum is 49.

The spelling of 20553415879 in words is "twenty billion, five hundred fifty-three million, four hundred fifteen thousand, eight hundred seventy-nine".