21914496 has 128 divisors (see below), whose sum is σ = 68666400. Its totient is φ = 6856704.

The previous prime is 21914491. The next prime is 21914509. The reversal of 21914496 is 69441912.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 21914496.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21914491) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 58566 + ... + 58938.

Almost surely, 2^21914496 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21914496, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34333200).

21914496 is an abundant number, since it is smaller than the sum of its proper divisors (46751904).

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

21914496 is a wasteful number, since it uses less digits than its factorization.

21914496 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 413 (or 395 counting only the distinct ones).

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

The square root of 21914496 is about 4681.2921293164. The cubic root of 21914496 is about 279.8404533237.

The spelling of 21914496 in words is "twenty-one million, nine hundred fourteen thousand, four hundred ninety-six".