18897902 has 4 divisors (see below), whose sum is σ = 28346856. Its totient is φ = 9448950.

The previous prime is 18897899. The next prime is 18897911. The reversal of 18897902 is 20979881.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 4724474 + ... + 4724477.

It is an arithmetic number, because the mean of its divisors is an integer number (7086714).

Almost surely, 2^18897902 is an apocalyptic number.

18897902 is a deficient number, since it is larger than the sum of its proper divisors (9448954).

18897902 is an equidigital number, since it uses as much as digits as its factorization.

18897902 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9448953.

The product of its (nonzero) digits is 72576, while the sum is 44.

The square root of 18897902 is about 4347.1717242363. The cubic root of 18897902 is about 266.3613439539.

The spelling of 18897902 in words is "eighteen million, eight hundred ninety-seven thousand, nine hundred two".