18742902 has 16 divisors (see below), whose sum is σ = 37627392. Its totient is φ = 6224040.

The previous prime is 18742901. The next prime is 18742909. The reversal of 18742902 is 20924781.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18742901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4138 + ... + 7389.

It is an arithmetic number, because the mean of its divisors is an integer number (2351712).

Almost surely, 2^18742902 is an apocalyptic number.

18742902 is an abundant number, since it is smaller than the sum of its proper divisors (18884490).

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

18742902 is a wasteful number, since it uses less digits than its factorization.

18742902 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11803.

The product of its (nonzero) digits is 8064, while the sum is 33.

The square root of 18742902 is about 4329.3073348978. The cubic root of 18742902 is about 265.6311147289.

The spelling of 18742902 in words is "eighteen million, seven hundred forty-two thousand, nine hundred two".