21949332 has 24 divisors (see below), whose sum is σ = 53911200. Its totient is φ = 6931296.

The previous prime is 21949331. The next prime is 21949373. The reversal of 21949332 is 23394912.

It is a junction number, because it is equal to n+sod(n) for n = 21949293 and 21949302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21949331) 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, 47907 + ... + 48362.

It is an arithmetic number, because the mean of its divisors is an integer number (2246300).

Almost surely, 2^21949332 is an apocalyptic number.

It is an amenable number.

21949332 is an abundant number, since it is smaller than the sum of its proper divisors (31961868).

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

21949332 is a wasteful number, since it uses less digits than its factorization.

21949332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96295 (or 96293 counting only the distinct ones).

The product of its digits is 11664, while the sum is 33.

The square root of 21949332 is about 4685.0114194098. The cubic root of 21949332 is about 279.9886560030.

The spelling of 21949332 in words is "twenty-one million, nine hundred forty-nine thousand, three hundred thirty-two".