18063531 has 12 divisors (see below), whose sum is σ = 26132808. Its totient is φ = 12023424.

The previous prime is 18063527. The next prime is 18063541. The reversal of 18063531 is 13536081.

It is not a de Polignac number, because 18063531 - 2² = 18063527 is a prime.

It is a super-2 number, since 2×18063531² = 652582304375922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 18063495 and 18063504.

It is not an unprimeable number, because it can be changed into a prime (18063541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6811 + ... + 9083.

It is an arithmetic number, because the mean of its divisors is an integer number (2177734).

Almost surely, 2^18063531 is an apocalyptic number.

18063531 is a deficient number, since it is larger than the sum of its proper divisors (8069277).

18063531 is a wasteful number, since it uses less digits than its factorization.

18063531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3162 (or 3159 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 18063531 is about 4250.1212923868. The cubic root of 18063531 is about 262.3821076050.

The spelling of 18063531 in words is "eighteen million, sixty-three thousand, five hundred thirty-one".