20879955051 has 16 divisors (see below), whose sum is σ = 27907883520. Its totient is φ = 13886030880.

The previous prime is 20879955049. The next prime is 20879955071. The reversal of 20879955051 is 15055997802.

It is not a de Polignac number, because 20879955051 - 2¹ = 20879955049 is a prime.

It is a super-3 number, since 3×20879955051³ (a number of 32 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20879954985 and 20879955003.

It is not an unprimeable number, because it can be changed into a prime (20879955011) 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, 4124760 + ... + 4129818.

It is an arithmetic number, because the mean of its divisors is an integer number (1744242720).

Almost surely, 2^20879955051 is an apocalyptic number.

20879955051 is a deficient number, since it is larger than the sum of its proper divisors (7027928469).

20879955051 is a wasteful number, since it uses less digits than its factorization.

20879955051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8146.

The product of its (nonzero) digits is 1134000, while the sum is 51.

The spelling of 20879955051 in words is "twenty billion, eight hundred seventy-nine million, nine hundred fifty-five thousand, fifty-one".