18235740 has 48 divisors (see below), whose sum is σ = 51246720. Its totient is φ = 4845120.

The previous prime is 18235739. The next prime is 18235753. The reversal of 18235740 is 4753281.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 18235698 and 18235707.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29151 + ... + 29769.

It is an arithmetic number, because the mean of its divisors is an integer number (1067640).

Almost surely, 2^18235740 is an apocalyptic number.

18235740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18235740 is an abundant number, since it is smaller than the sum of its proper divisors (33010980).

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

18235740 is a wasteful number, since it uses less digits than its factorization.

18235740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1122 (or 1120 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 18235740 is about 4270.3325397444. The cubic root of 18235740 is about 263.2132800338.

The spelling of 18235740 in words is "eighteen million, two hundred thirty-five thousand, seven hundred forty".