18726442 has 8 divisors (see below), whose sum is σ = 32102496. Its totient is φ = 8025612.

The previous prime is 18726427. The next prime is 18726479. The reversal of 18726442 is 24462781.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 18726398 and 18726407.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 668788 + ... + 668815.

It is an arithmetic number, because the mean of its divisors is an integer number (4012812).

Almost surely, 2^18726442 is an apocalyptic number.

18726442 is a deficient number, since it is larger than the sum of its proper divisors (13376054).

18726442 is a wasteful number, since it uses less digits than its factorization.

18726442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1337612.

The product of its digits is 21504, while the sum is 34.

The square root of 18726442 is about 4327.4059204101. The cubic root of 18726442 is about 265.5533329516.

The spelling of 18726442 in words is "eighteen million, seven hundred twenty-six thousand, four hundred forty-two".