20379633121 has 4 divisors (see below), whose sum is σ = 20493486000. Its totient is φ = 20265780244.

The previous prime is 20379633119. The next prime is 20379633179. The reversal of 20379633121 is 12133697302.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12133697302 = 2 ⋅6066848651.

It is a cyclic number.

It is not a de Polignac number, because 20379633121 - 2¹ = 20379633119 is a prime.

It is a super-2 number, since 2×20379633121² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20379633821) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56926171 + ... + 56926528.

It is an arithmetic number, because the mean of its divisors is an integer number (5123371500).

Almost surely, 2^20379633121 is an apocalyptic number.

It is an amenable number.

20379633121 is a deficient number, since it is larger than the sum of its proper divisors (113852879).

20379633121 is a wasteful number, since it uses less digits than its factorization.

20379633121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113852878.

The product of its (nonzero) digits is 40824, while the sum is 37.

The spelling of 20379633121 in words is "twenty billion, three hundred seventy-nine million, six hundred thirty-three thousand, one hundred twenty-one".