20272720051 has 4 divisors (see below), whose sum is σ = 20299715104. Its totient is φ = 20245725000.

The previous prime is 20272720049. The next prime is 20272720063. The reversal of 20272720051 is 15002727202.

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 20272720051 - 2¹ = 20272720049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20272720021) 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, 13496400 + ... + 13497901.

It is an arithmetic number, because the mean of its divisors is an integer number (5074928776).

Almost surely, 2^20272720051 is an apocalyptic number.

20272720051 is a deficient number, since it is larger than the sum of its proper divisors (26995053).

20272720051 is an equidigital number, since it uses as much as digits as its factorization.

20272720051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26995052.

The product of its (nonzero) digits is 3920, while the sum is 28.

It can be divided in two parts, 202727 and 20051, that added together give a triangular number (222778 = T₆₆₇).

The spelling of 20272720051 in words is "twenty billion, two hundred seventy-two million, seven hundred twenty thousand, fifty-one".