18770842 has 4 divisors (see below), whose sum is σ = 28156266. Its totient is φ = 9385420.

The previous prime is 18770837. The next prime is 18770849. The reversal of 18770842 is 24807781.

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., 13476241 + 5294601 = 3671^2 + 2301^2 .

It is not an unprimeable number, because it can be changed into a prime (18770849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4692709 + ... + 4692712.

Almost surely, 2^18770842 is an apocalyptic number.

18770842 is a deficient number, since it is larger than the sum of its proper divisors (9385424).

18770842 is an equidigital number, since it uses as much as digits as its factorization.

18770842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9385423.

The product of its (nonzero) digits is 25088, while the sum is 37.

The square root of 18770842 is about 4332.5329773702. The cubic root of 18770842 is about 265.7630410895.

The spelling of 18770842 in words is "eighteen million, seven hundred seventy thousand, eight hundred forty-two".