18537552441 has 12 divisors (see below), whose sum is σ = 26805613120. Its totient is φ = 12344915160.

The previous prime is 18537552431. The next prime is 18537552461. The reversal of 18537552441 is 14425573581.

18537552441 is a `hidden beast` number, since 1 + 8 + 53 + 7 + 552 + 4 + 41 = 666.

It is not a de Polignac number, because 18537552441 - 2²⁷ = 18403334713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18537552431) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1112365 + ... + 1128906.

Almost surely, 2^18537552441 is an apocalyptic number.

It is an amenable number.

18537552441 is a deficient number, since it is larger than the sum of its proper divisors (8268060679).

18537552441 is a wasteful number, since it uses less digits than its factorization.

18537552441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2242196 (or 2242193 counting only the distinct ones).

The product of its digits is 672000, while the sum is 45.

The spelling of 18537552441 in words is "eighteen billion, five hundred thirty-seven million, five hundred fifty-two thousand, four hundred forty-one".