20455772740731 has 6 divisors (see below), whose sum is σ = 29547227292180. Its totient is φ = 13637181827148.

The previous prime is 20455772740709. The next prime is 20455772740763. The reversal of 20455772740731 is 13704727755402.

20455772740731 is a `hidden beast` number, since 2 + 0 + 4 + 5 + 577 + 27 + 40 + 7 + 3 + 1 = 666.

It is not a de Polignac number, because 20455772740731 - 2¹⁹ = 20455772216443 is a prime.

It is a super-2 number, since 2×20455772740731² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20455772740231) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1136431818921 + ... + 1136431818938.

It is an arithmetic number, because the mean of its divisors is an integer number (4924537882030).

Almost surely, 2^{20455772740731} is an apocalyptic number.

20455772740731 is a deficient number, since it is larger than the sum of its proper divisors (9091454551449).

20455772740731 is a wasteful number, since it uses less digits than its factorization.

20455772740731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2272863637865 (or 2272863637862 counting only the distinct ones).

The product of its (nonzero) digits is 11524800, while the sum is 54.

The spelling of 20455772740731 in words is "twenty trillion, four hundred fifty-five billion, seven hundred seventy-two million, seven hundred forty thousand, seven hundred thirty-one".