20455500136121 has 16 divisors (see below), whose sum is σ = 20910770008128. Its totient is φ = 20002806532800.

The previous prime is 20455500136117. The next prime is 20455500136157. The reversal of 20455500136121 is 12163100555402.

It is a cyclic number.

It is not a de Polignac number, because 20455500136121 - 2² = 20455500136117 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20455500136021) 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, 304087631 + ... + 304154891.

It is an arithmetic number, because the mean of its divisors is an integer number (1306923125508).

Almost surely, 2^{20455500136121} is an apocalyptic number.

It is an amenable number.

20455500136121 is a deficient number, since it is larger than the sum of its proper divisors (455269872007).

20455500136121 is a wasteful number, since it uses less digits than its factorization.

20455500136121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86312.

The product of its (nonzero) digits is 36000, while the sum is 35.

The spelling of 20455500136121 in words is "twenty trillion, four hundred fifty-five billion, five hundred million, one hundred thirty-six thousand, one hundred twenty-one".