18531846152 has 8 divisors (see below), whose sum is σ = 34747211550. Its totient is φ = 9265923072.

The previous prime is 18531846131. The next prime is 18531846161. The reversal of 18531846152 is 25164813581.

It can be written as a sum of positive squares in only one way, i.e., 12244307716 + 6287538436 = 110654^2 + 79294^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1158240377 + ... + 1158240392.

Almost surely, 2^18531846152 is an apocalyptic number.

It is an amenable number.

18531846152 is a deficient number, since it is larger than the sum of its proper divisors (16215365398).

18531846152 is a wasteful number, since it uses less digits than its factorization.

18531846152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2316480775 (or 2316480771 counting only the distinct ones).

The product of its digits is 230400, while the sum is 44.

The spelling of 18531846152 in words is "eighteen billion, five hundred thirty-one million, eight hundred forty-six thousand, one hundred fifty-two".