20451510311051 has 16 divisors (see below), whose sum is σ = 22016005714560. Its totient is φ = 18940239901440.

The previous prime is 20451510311039. The next prime is 20451510311107. The reversal of 20451510311051 is 15011301515402.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 20451510311051 - 2³⁸ = 20176632404107 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20451510314051) 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, 61152326 + ... + 61485851.

It is an arithmetic number, because the mean of its divisors is an integer number (1376000357160).

Almost surely, 2^{20451510311051} is an apocalyptic number.

20451510311051 is a deficient number, since it is larger than the sum of its proper divisors (1564495403509).

20451510311051 is a wasteful number, since it uses less digits than its factorization.

20451510311051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122638394.

The product of its (nonzero) digits is 3000, while the sum is 29.

Adding to 20451510311051 its reverse (15011301515402), we get a palindrome (35462811826453).

The spelling of 20451510311051 in words is "twenty trillion, four hundred fifty-one billion, five hundred ten million, three hundred eleven thousand, fifty-one".