4215921994 has 8 divisors (see below), whose sum is σ = 6443201700. Its totient is φ = 2068188096.

The previous prime is 4215921977. The next prime is 4215922001. The reversal of 4215921994 is 4991295124.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 4168380969 + 47541025 = 64563^2 + 6895^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19886319 + ... + 19886530.

Almost surely, 2^4215921994 is an apocalyptic number.

4215921994 is a deficient number, since it is larger than the sum of its proper divisors (2227279706).

4215921994 is a wasteful number, since it uses less digits than its factorization.

4215921994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39772904.

The product of its digits is 233280, while the sum is 46.

The square root of 4215921994 is about 64930.1316339340. The cubic root of 4215921994 is about 1615.4648847152.

The spelling of 4215921994 in words is "four billion, two hundred fifteen million, nine hundred twenty-one thousand, nine hundred ninety-four".