18860825631 has 8 divisors (see below), whose sum is σ = 26241148800. Its totient is φ = 12027193112.

The previous prime is 18860825623. The next prime is 18860825651. The reversal of 18860825631 is 13652806881.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18860825631 - 2³ = 18860825623 is a prime.

It is a super-2 number, since 2×18860825631² (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 (18860825651) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 136672581 + ... + 136672718.

It is an arithmetic number, because the mean of its divisors is an integer number (3280143600).

Almost surely, 2^18860825631 is an apocalyptic number.

18860825631 is a deficient number, since it is larger than the sum of its proper divisors (7380323169).

18860825631 is a wasteful number, since it uses less digits than its factorization.

18860825631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273345325.

The product of its (nonzero) digits is 552960, while the sum is 48.

The spelling of 18860825631 in words is "eighteen billion, eight hundred sixty million, eight hundred twenty-five thousand, six hundred thirty-one".