18299740 has 24 divisors (see below), whose sum is σ = 38545920. Its totient is φ = 7297728.

The previous prime is 18299737. The next prime is 18299747. The reversal of 18299740 is 4799281.

It is a junction number, because it is equal to n+sod(n) for n = 18299693 and 18299702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18299747) 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, 6466 + ... + 8854.

It is an arithmetic number, because the mean of its divisors is an integer number (1606080).

Almost surely, 2^18299740 is an apocalyptic number.

18299740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18299740 is an abundant number, since it is smaller than the sum of its proper divisors (20246180).

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

18299740 is a wasteful number, since it uses less digits than its factorization.

18299740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2781 (or 2779 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 40.

The square root of 18299740 is about 4277.8195380357. The cubic root of 18299740 is about 263.5208442116.

The spelling of 18299740 in words is "eighteen million, two hundred ninety-nine thousand, seven hundred forty".