18757642 has 8 divisors (see below), whose sum is σ = 28522116. Its totient is φ = 9250272.

The previous prime is 18757637. The next prime is 18757643. The reversal of 18757642 is 24675781.

It can be written as a sum of positive squares in 2 ways, for example, as 18757561 + 81 = 4331^2 + 9^2 .

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 = 18757595 and 18757604.

It is not an unprimeable number, because it can be changed into a prime (18757643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64093 + ... + 64384.

Almost surely, 2^18757642 is an apocalyptic number.

18757642 is a deficient number, since it is larger than the sum of its proper divisors (9764474).

18757642 is a wasteful number, since it uses less digits than its factorization.

18757642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128552.

The product of its digits is 94080, while the sum is 40.

The square root of 18757642 is about 4331.0093511790. The cubic root of 18757642 is about 265.7007300012.

The spelling of 18757642 in words is "eighteen million, seven hundred fifty-seven thousand, six hundred forty-two".