18813740 has 24 divisors (see below), whose sum is σ = 43101072. Its totient is φ = 6841280.

The previous prime is 18813731. The next prime is 18813757. The reversal of 18813740 is 4731881.

It is a junction number, because it is equal to n+sod(n) for n = 18813697 and 18813706.

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, 42539 + ... + 42978.

It is an arithmetic number, because the mean of its divisors is an integer number (1795878).

Almost surely, 2^18813740 is an apocalyptic number.

18813740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18813740 is an abundant number, since it is smaller than the sum of its proper divisors (24287332).

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

18813740 is a wasteful number, since it uses less digits than its factorization.

18813740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85537 (or 85535 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 32.

The square root of 18813740 is about 4337.4808356925. The cubic root of 18813740 is about 265.9653411793.

The spelling of 18813740 in words is "eighteen million, eight hundred thirteen thousand, seven hundred forty".