18930402 has 16 divisors (see below), whose sum is σ = 42067680. Its totient is φ = 6310116.

The previous prime is 18930377. The next prime is 18930407. The reversal of 18930402 is 20403981.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (18930407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 175228 + ... + 175335.

It is an arithmetic number, because the mean of its divisors is an integer number (2629230).

Almost surely, 2^18930402 is an apocalyptic number.

18930402 is an abundant number, since it is smaller than the sum of its proper divisors (23137278).

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

18930402 is a wasteful number, since it uses less digits than its factorization.

18930402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 350574 (or 350568 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 18930402 is about 4350.9081810583. The cubic root of 18930402 is about 266.5139497102.

The spelling of 18930402 in words is "eighteen million, nine hundred thirty thousand, four hundred two".