18949402 has 16 divisors (see below), whose sum is σ = 29390112. Its totient is φ = 9156240.

The previous prime is 18949391. The next prime is 18949417. The reversal of 18949402 is 20494981.

It is a happy number.

It is a super-3 number, since 3×18949402³ (a number of 23 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (37).

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, 11277 + ... + 12847.

It is an arithmetic number, because the mean of its divisors is an integer number (1836882).

Almost surely, 2^18949402 is an apocalyptic number.

18949402 is a deficient number, since it is larger than the sum of its proper divisors (10440710).

18949402 is a wasteful number, since it uses less digits than its factorization.

18949402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1773.

The product of its (nonzero) digits is 20736, while the sum is 37.

The square root of 18949402 is about 4353.0910856540. The cubic root of 18949402 is about 266.6030844939.

The spelling of 18949402 in words is "eighteen million, nine hundred forty-nine thousand, four hundred two".