18890744630 has 8 divisors (see below), whose sum is σ = 34003340352. Its totient is φ = 7556297848.

The previous prime is 18890744627. The next prime is 18890744659. The reversal of 18890744630 is 3644709881.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 944537222 + ... + 944537241.

It is an arithmetic number, because the mean of its divisors is an integer number (4250417544).

Almost surely, 2^18890744630 is an apocalyptic number.

18890744630 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18890744630 is a deficient number, since it is larger than the sum of its proper divisors (15112595722).

18890744630 is a wasteful number, since it uses less digits than its factorization.

18890744630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1889074470.

The product of its (nonzero) digits is 1161216, while the sum is 50.

The spelling of 18890744630 in words is "eighteen billion, eight hundred ninety million, seven hundred forty-four thousand, six hundred thirty".