18275521954 has 4 divisors (see below), whose sum is σ = 27413282934. Its totient is φ = 9137760976.

The previous prime is 18275521949. The next prime is 18275521961. The reversal of 18275521954 is 45912557281.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 12482028729 + 5793493225 = 111723^2 + 76115^2 .

It is a super-2 number, since 2×18275521954² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 18275521898 and 18275521907.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4568880487 + ... + 4568880490.

Almost surely, 2^18275521954 is an apocalyptic number.

18275521954 is a deficient number, since it is larger than the sum of its proper divisors (9137760980).

18275521954 is an equidigital number, since it uses as much as digits as its factorization.

18275521954 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9137760979.

The product of its digits is 1008000, while the sum is 49.

The spelling of 18275521954 in words is "eighteen billion, two hundred seventy-five million, five hundred twenty-one thousand, nine hundred fifty-four".