18454594977 has 24 divisors (see below), whose sum is σ = 32808170304. Its totient is φ = 9734291424.

The previous prime is 18454594973. The next prime is 18454594997. The reversal of 18454594977 is 77949545481.

18454594977 is a `hidden beast` number, since 1 + 8 + 454 + 5 + 94 + 97 + 7 = 666.

It is not a de Polignac number, because 18454594977 - 2² = 18454594973 is a prime.

It is a super-2 number, since 2×18454594977² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (18454594973) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11265723 + ... + 11267360.

It is an arithmetic number, because the mean of its divisors is an integer number (1367007096).

Almost surely, 2^18454594977 is an apocalyptic number.

It is an amenable number.

18454594977 is a deficient number, since it is larger than the sum of its proper divisors (14353575327).

18454594977 is a wasteful number, since it uses less digits than its factorization.

18454594977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22533109 (or 22533106 counting only the distinct ones).

The product of its digits is 50803200, while the sum is 63.

The spelling of 18454594977 in words is "eighteen billion, four hundred fifty-four million, five hundred ninety-four thousand, nine hundred seventy-seven".