18890612224 has 40 divisors (see below), whose sum is σ = 41175643608. Its totient is φ = 8586639360.

The previous prime is 18890612179. The next prime is 18890612227. The reversal of 18890612224 is 42221609881.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18890612227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1671447 + ... + 1682710.

Almost surely, 2^18890612224 is an apocalyptic number.

It is an amenable number.

18890612224 is an abundant number, since it is smaller than the sum of its proper divisors (22285031384).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18890612224 is an equidigital number, since it uses as much as digits as its factorization.

18890612224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3354186 (or 3354170 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 43.

The spelling of 18890612224 in words is "eighteen billion, eight hundred ninety million, six hundred twelve thousand, two hundred twenty-four".