186920042 has 4 divisors (see below), whose sum is σ = 280380066. Its totient is φ = 93460020.

The previous prime is 186920039. The next prime is 186920089. The reversal of 186920042 is 240029681.

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., 131997121 + 54922921 = 11489^2 + 7411^2 .

It is a junction number, because it is equal to n+sod(n) for n = 186919990 and 186920008.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 46730009 + ... + 46730012.

Almost surely, 2^186920042 is an apocalyptic number.

186920042 is a deficient number, since it is larger than the sum of its proper divisors (93460024).

186920042 is an equidigital number, since it uses as much as digits as its factorization.

186920042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93460023.

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 186920042 is about 13671.8704645707. The cubic root of 186920042 is about 571.7663907414.

The spelling of 186920042 in words is "one hundred eighty-six million, nine hundred twenty thousand, forty-two".