18918053430 has 64 divisors (see below), whose sum is σ = 47240832960. Its totient is φ = 4842661376.

The previous prime is 18918053411. The next prime is 18918053467. The reversal of 18918053430 is 3435081981.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 87664 + ... + 213356.

It is an arithmetic number, because the mean of its divisors is an integer number (738138015).

Almost surely, 2^18918053430 is an apocalyptic number.

18918053430 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 18918053430, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23620416480).

18918053430 is an abundant number, since it is smaller than the sum of its proper divisors (28322779530).

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

18918053430 is a wasteful number, since it uses less digits than its factorization.

18918053430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125905.

The product of its (nonzero) digits is 103680, while the sum is 42.

The spelling of 18918053430 in words is "eighteen billion, nine hundred eighteen million, fifty-three thousand, four hundred thirty".