18090548631 has 24 divisors (see below), whose sum is σ = 26617150560. Its totient is φ = 11836756800.

The previous prime is 18090548617. The next prime is 18090548653. The reversal of 18090548631 is 13684509081.

18090548631 is a `hidden beast` number, since 1 + 8 + 0 + 9 + 0 + 5 + 4 + 8 + 631 = 666.

It is not a de Polignac number, because 18090548631 - 2¹³ = 18090540439 is a prime.

It is a super-2 number, since 2×18090548631² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18090548431) 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, 217350 + ... + 288828.

It is an arithmetic number, because the mean of its divisors is an integer number (1109047940).

Almost surely, 2^18090548631 is an apocalyptic number.

18090548631 is a deficient number, since it is larger than the sum of its proper divisors (8526601929).

18090548631 is a wasteful number, since it uses less digits than its factorization.

18090548631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72007 (or 72004 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 45.

The spelling of 18090548631 in words is "eighteen billion, ninety million, five hundred forty-eight thousand, six hundred thirty-one".