18030992 has 40 divisors (see below), whose sum is σ = 40176000. Its totient is φ = 7679232.

The previous prime is 18030977. The next prime is 18031007. The reversal of 18030992 is 29903081.

It is an interprime number because it is at equal distance from previous prime (18030977) and next prime (18031007).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21884 + ... + 22692.

It is an arithmetic number, because the mean of its divisors is an integer number (1004400).

Almost surely, 2^18030992 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18030992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20088000).

18030992 is an abundant number, since it is smaller than the sum of its proper divisors (22145008).

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

18030992 is a wasteful number, since it uses less digits than its factorization.

18030992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1023 (or 1017 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 32.

The square root of 18030992 is about 4246.2915585249. The cubic root of 18030992 is about 262.2244643216.

The spelling of 18030992 in words is "eighteen million, thirty thousand, nine hundred ninety-two".