18899734 has 16 divisors (see below), whose sum is σ = 33090048. Its totient is φ = 7927272.

The previous prime is 18899719. The next prime is 18899743. The reversal of 18899734 is 43799881.

It is a happy number.

It is a congruent number.

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, 13704 + ... + 15019.

It is an arithmetic number, because the mean of its divisors is an integer number (2068128).

Almost surely, 2^18899734 is an apocalyptic number.

18899734 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

18899734 is a deficient number, since it is larger than the sum of its proper divisors (14190314).

18899734 is a wasteful number, since it uses less digits than its factorization.

18899734 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28779.

The product of its digits is 435456, while the sum is 49.

The square root of 18899734 is about 4347.3824308427. The cubic root of 18899734 is about 266.3699508742.

The spelling of 18899734 in words is "eighteen million, eight hundred ninety-nine thousand, seven hundred thirty-four".