18152740 has 12 divisors (see below), whose sum is σ = 38120796. Its totient is φ = 7261088.

The previous prime is 18152713. The next prime is 18152741. The reversal of 18152740 is 4725181.

It can be written as a sum of positive squares in 2 ways, for example, as 7354944 + 10797796 = 2712^2 + 3286^2 .

It is a junction number, because it is equal to n+sod(n) for n = 18152699 and 18152708.

It is not an unprimeable number, because it can be changed into a prime (18152741) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 453799 + ... + 453838.

It is an arithmetic number, because the mean of its divisors is an integer number (3176733).

Almost surely, 2^18152740 is an apocalyptic number.

18152740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18152740 is an abundant number, since it is smaller than the sum of its proper divisors (19968056).

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

18152740 is a wasteful number, since it uses less digits than its factorization.

18152740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 907646 (or 907644 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 28.

The square root of 18152740 is about 4260.6032436734. The cubic root of 18152740 is about 262.8133340777.

The spelling of 18152740 in words is "eighteen million, one hundred fifty-two thousand, seven hundred forty".