21949094 has 16 divisors (see below), whose sum is σ = 33965568. Its totient is φ = 10632072.

The previous prime is 21949093. The next prime is 21949097. The reversal of 21949094 is 49094912.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21949093) 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, 8549 + ... + 10815.

It is an arithmetic number, because the mean of its divisors is an integer number (2122848).

Almost surely, 2^21949094 is an apocalyptic number.

21949094 is a deficient number, since it is larger than the sum of its proper divisors (12016474).

21949094 is a wasteful number, since it uses less digits than its factorization.

21949094 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2419.

The product of its (nonzero) digits is 23328, while the sum is 38.

The square root of 21949094 is about 4684.9860191894. The cubic root of 21949094 is about 279.9876440126.

The spelling of 21949094 in words is "twenty-one million, nine hundred forty-nine thousand, ninety-four".