3918021942 has 16 divisors (see below), whose sum is σ = 7837539840. Its totient is φ = 1305757992.

The previous prime is 3918021941. The next prime is 3918021973. The reversal of 3918021942 is 2491208193.

It is a self number, because there is not a number n which added to its sum of digits gives 3918021942.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3918021941) 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, 26718 + ... + 92465.

It is an arithmetic number, because the mean of its divisors is an integer number (489846240).

Almost surely, 2^3918021942 is an apocalyptic number.

3918021942 is an abundant number, since it is smaller than the sum of its proper divisors (3919517898).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3918021942 is a wasteful number, since it uses less digits than its factorization.

3918021942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124667.

The product of its (nonzero) digits is 31104, while the sum is 39.

The square root of 3918021942 is about 62594.1046904579. The cubic root of 3918021942 is about 1576.4817756623.

The spelling of 3918021942 in words is "three billion, nine hundred eighteen million, twenty-one thousand, nine hundred forty-two".