42007918 has 16 divisors (see below), whose sum is σ = 66893040. Its totient is φ = 19716736.

The previous prime is 42007909. The next prime is 42007919. The reversal of 42007918 is 81970024.

It is a self number, because there is not a number n which added to its sum of digits gives 42007918.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42007919) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13668 + ... + 16456.

It is an arithmetic number, because the mean of its divisors is an integer number (4180815).

Almost surely, 2^42007918 is an apocalyptic number.

42007918 is a deficient number, since it is larger than the sum of its proper divisors (24885122).

42007918 is a wasteful number, since it uses less digits than its factorization.

42007918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3251.

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 42007918 is about 6481.3515565814. The cubic root of 42007918 is about 347.6245069089.

The spelling of 42007918 in words is "forty-two million, seven thousand, nine hundred eighteen".