18143734 has 48 divisors (see below), whose sum is σ = 34115328. Its totient is φ = 7074144.

The previous prime is 18143729. The next prime is 18143761. The reversal of 18143734 is 43734181.

Its product of digits (8064) is a multiple of the sum of its prime divisors (128).

It is a junction number, because it is equal to n+sod(n) for n = 18143696 and 18143705.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 270769 + ... + 270835.

It is an arithmetic number, because the mean of its divisors is an integer number (710736).

Almost surely, 2^18143734 is an apocalyptic number.

18143734 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

18143734 is a deficient number, since it is larger than the sum of its proper divisors (15971594).

18143734 is a wasteful number, since it uses less digits than its factorization.

18143734 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157 (or 128 counting only the distinct ones).

The product of its digits is 8064, while the sum is 31.

The square root of 18143734 is about 4259.5462199629. The cubic root of 18143734 is about 262.7698642687.

The spelling of 18143734 in words is "eighteen million, one hundred forty-three thousand, seven hundred thirty-four".