18253040 has 40 divisors (see below), whose sum is σ = 45705408. Its totient is φ = 6739200.

The previous prime is 18253033. The next prime is 18253043. The reversal of 18253040 is 4035281.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 18252997 and 18253015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18253043) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7736 + ... + 9815.

Almost surely, 2^18253040 is an apocalyptic number.

18253040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18253040 is an abundant number, since it is smaller than the sum of its proper divisors (27452368).

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

18253040 is a wasteful number, since it uses less digits than its factorization.

18253040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17577 (or 17571 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 18253040 is about 4272.3576629304. The cubic root of 18253040 is about 263.2964893529.

The spelling of 18253040 in words is "eighteen million, two hundred fifty-three thousand, forty".