21994083 has 6 divisors (see below), whose sum is σ = 31769244. Its totient is φ = 14662716.

The previous prime is 21994069. The next prime is 21994111. The reversal of 21994083 is 38049912.

It is not a de Polignac number, because 21994083 - 2¹⁷ = 21863011 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21994013) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1221885 + ... + 1221902.

It is an arithmetic number, because the mean of its divisors is an integer number (5294874).

Almost surely, 2^21994083 is an apocalyptic number.

21994083 is a deficient number, since it is larger than the sum of its proper divisors (9775161).

21994083 is a wasteful number, since it uses less digits than its factorization.

21994083 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2443793 (or 2443790 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 21994083 is about 4689.7849630873. The cubic root of 21994083 is about 280.1788101059.

The spelling of 21994083 in words is "twenty-one million, nine hundred ninety-four thousand, eighty-three".