42095818 has 4 divisors (see below), whose sum is σ = 63143730. Its totient is φ = 21047908.

The previous prime is 42095813. The next prime is 42095821. The reversal of 42095818 is 81859024.

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., 41254929 + 840889 = 6423^2 + 917^2 .

It is not an unprimeable number, because it can be changed into a prime (42095813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10523953 + ... + 10523956.

Almost surely, 2^42095818 is an apocalyptic number.

42095818 is a deficient number, since it is larger than the sum of its proper divisors (21047912).

42095818 is a wasteful number, since it uses less digits than its factorization.

42095818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21047911.

The product of its (nonzero) digits is 23040, while the sum is 37.

The square root of 42095818 is about 6488.1290061157. The cubic root of 42095818 is about 347.8668017570.

The spelling of 42095818 in words is "forty-two million, ninety-five thousand, eight hundred eighteen".