20672056051 has 4 divisors (see below), whose sum is σ = 21384885600. Its totient is φ = 19959226504.

The previous prime is 20672056043. The next prime is 20672056057. The reversal of 20672056051 is 15065027602.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20672056051 - 2³ = 20672056043 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20672055998 and 20672056016.

It is not an unprimeable number, because it can be changed into a prime (20672056057) 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, 356414731 + ... + 356414788.

It is an arithmetic number, because the mean of its divisors is an integer number (5346221400).

Almost surely, 2^20672056051 is an apocalyptic number.

20672056051 is a deficient number, since it is larger than the sum of its proper divisors (712829549).

20672056051 is an equidigital number, since it uses as much as digits as its factorization.

20672056051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 712829548.

The product of its (nonzero) digits is 25200, while the sum is 34.

The spelling of 20672056051 in words is "twenty billion, six hundred seventy-two million, fifty-six thousand, fifty-one".