21926496 has 48 divisors (see below), whose sum is σ = 59122224. Its totient is φ = 7110144.

The previous prime is 21926491. The next prime is 21926503. The reversal of 21926496 is 69462912.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21926491) 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, 466 + ... + 6638.

It is an arithmetic number, because the mean of its divisors is an integer number (1231713).

Almost surely, 2^21926496 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 21926496, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29561112).

21926496 is an abundant number, since it is smaller than the sum of its proper divisors (37195728).

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

21926496 is a wasteful number, since it uses less digits than its factorization.

21926496 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6223 (or 6215 counting only the distinct ones).

The product of its digits is 46656, while the sum is 39.

The square root of 21926496 is about 4682.5736513161. The cubic root of 21926496 is about 279.8915226050.

It can be divided in two parts, 21926 and 496, that added together give a palindrome (22422).

The spelling of 21926496 in words is "twenty-one million, nine hundred twenty-six thousand, four hundred ninety-six".