18263740 has 36 divisors (see below), whose sum is σ = 42163128. Its totient is φ = 6640480.

The previous prime is 18263719. The next prime is 18263741. The reversal of 18263740 is 4736281.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18263741) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1354 + ... + 6193.

It is an arithmetic number, because the mean of its divisors is an integer number (1171198).

Almost surely, 2^18263740 is an apocalyptic number.

18263740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18263740 is an abundant number, since it is smaller than the sum of its proper divisors (23899388).

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

18263740 is a wasteful number, since it uses less digits than its factorization.

18263740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7578 (or 7565 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 18263740 is about 4273.6097154513. The cubic root of 18263740 is about 263.3479277638.

The spelling of 18263740 in words is "eighteen million, two hundred sixty-three thousand, seven hundred forty".