21950912 has 28 divisors (see below), whose sum is σ = 45064680. Its totient is φ = 10596096.

The previous prime is 21950899. The next prime is 21950921. The reversal of 21950912 is 21905912.

It is a super-3 number, since 3×21950912³ (a number of 23 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4058 + ... + 7769.

Almost surely, 2^21950912 is an apocalyptic number.

It is an amenable number.

21950912 is an abundant number, since it is smaller than the sum of its proper divisors (23113768).

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

21950912 is a wasteful number, since it uses less digits than its factorization.

21950912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11868 (or 11858 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 29.

The square root of 21950912 is about 4685.1800392301. The cubic root of 21950912 is about 279.9953740732.

The spelling of 21950912 in words is "twenty-one million, nine hundred fifty thousand, nine hundred twelve".