18701042 has 4 divisors (see below), whose sum is σ = 28051566. Its totient is φ = 9350520.

The previous prime is 18701041. The next prime is 18701083. The reversal of 18701042 is 24010781.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 11566801 + 7134241 = 3401^2 + 2671^2 .

It is a junction number, because it is equal to n+sod(n) for n = 18700999 and 18701017.

It is not an unprimeable number, because it can be changed into a prime (18701041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4675259 + ... + 4675262.

Almost surely, 2^18701042 is an apocalyptic number.

18701042 is a deficient number, since it is larger than the sum of its proper divisors (9350524).

18701042 is an equidigital number, since it uses as much as digits as its factorization.

18701042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9350523.

The product of its (nonzero) digits is 448, while the sum is 23.

The square root of 18701042 is about 4324.4701409537. The cubic root of 18701042 is about 265.4332156943.

The spelling of 18701042 in words is "eighteen million, seven hundred one thousand, forty-two".