18727142 has 16 divisors (see below), whose sum is σ = 32247072. Its totient is φ = 7990080.

The previous prime is 18727123. The next prime is 18727147. The reversal of 18727142 is 24172781.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 18727099 and 18727108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18727147) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 392 + ... + 6132.

It is an arithmetic number, because the mean of its divisors is an integer number (2015442).

Almost surely, 2^18727142 is an apocalyptic number.

18727142 is a deficient number, since it is larger than the sum of its proper divisors (13519930).

18727142 is a wasteful number, since it uses less digits than its factorization.

18727142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5983.

The product of its digits is 6272, while the sum is 32.

The square root of 18727142 is about 4327.4867995177. The cubic root of 18727142 is about 265.5566417314.

The spelling of 18727142 in words is "eighteen million, seven hundred twenty-seven thousand, one hundred forty-two".