12020540051 has 16 divisors (see below), whose sum is σ = 13137481728. Its totient is φ = 10931306400.

The previous prime is 12020540039. The next prime is 12020540087. The reversal of 12020540051 is 15004502021.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12020540051 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12020540011) 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, 1442186 + ... + 1450496.

It is an arithmetic number, because the mean of its divisors is an integer number (821092608).

Almost surely, 2^12020540051 is an apocalyptic number.

12020540051 is a deficient number, since it is larger than the sum of its proper divisors (1116941677).

12020540051 is a wasteful number, since it uses less digits than its factorization.

12020540051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9962.

The product of its (nonzero) digits is 400, while the sum is 20.

The spelling of 12020540051 in words is "twelve billion, twenty million, five hundred forty thousand, fifty-one".