18740432 has 20 divisors (see below), whose sum is σ = 37155360. Its totient is φ = 9151968.

The previous prime is 18740431. The next prime is 18740437. The reversal of 18740432 is 23404781.

It is a junction number, because it is equal to n+sod(n) for n = 18740395 and 18740404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18740431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12932 + ... + 14307.

It is an arithmetic number, because the mean of its divisors is an integer number (1857768).

Almost surely, 2^18740432 is an apocalyptic number.

It is an amenable number.

18740432 is a deficient number, since it is larger than the sum of its proper divisors (18414928).

18740432 is a wasteful number, since it uses less digits than its factorization.

18740432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27290 (or 27284 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 29.

The square root of 18740432 is about 4329.0220604659. The cubic root of 18740432 is about 265.6194456416.

The spelling of 18740432 in words is "eighteen million, seven hundred forty thousand, four hundred thirty-two".