3918021943 has 32 divisors (see below), whose sum is σ = 4636735488. Its totient is φ = 3270489600.

The previous prime is 3918021941. The next prime is 3918021973. The reversal of 3918021943 is 3491208193.

It is a cyclic number.

It is not a de Polignac number, because 3918021943 - 2¹ = 3918021941 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3918021896 and 3918021905.

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 31 ways as a sum of consecutive naturals, for example, 4051246 + ... + 4052212.

It is an arithmetic number, because the mean of its divisors is an integer number (144897984).

Almost surely, 2^3918021943 is an apocalyptic number.

3918021943 is a deficient number, since it is larger than the sum of its proper divisors (718713545).

3918021943 is a wasteful number, since it uses less digits than its factorization.

3918021943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1503.

The product of its (nonzero) digits is 46656, while the sum is 40.

The square root of 3918021943 is about 62594.1046984458. The cubic root of 3918021943 is about 1576.4817757965.

The spelling of 3918021943 in words is "three billion, nine hundred eighteen million, twenty-one thousand, nine hundred forty-three".