18845890734 has 32 divisors (see below), whose sum is σ = 43282431360. Its totient is φ = 5410303200.

The previous prime is 18845890733. The next prime is 18845890759. The reversal of 18845890734 is 43709854881.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18845890733) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7513057 + ... + 7515564.

It is an arithmetic number, because the mean of its divisors is an integer number (1352575980).

Almost surely, 2^18845890734 is an apocalyptic number.

18845890734 is an abundant number, since it is smaller than the sum of its proper divisors (24436540626).

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

18845890734 is a wasteful number, since it uses less digits than its factorization.

18845890734 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15028656.

The product of its (nonzero) digits is 7741440, while the sum is 57.

The spelling of 18845890734 in words is "eighteen billion, eight hundred forty-five million, eight hundred ninety thousand, seven hundred thirty-four".