21594096 has 60 divisors (see below), whose sum is σ = 62529480. Its totient is φ = 6948480.

The previous prime is 21594091. The next prime is 21594101. The reversal of 21594096 is 69049512.

It is an interprime number because it is at equal distance from previous prime (21594091) and next prime (21594101).

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

It is a self number, because there is not a number n which added to its sum of digits gives 21594096.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21594091) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1591 + ... + 6761.

It is an arithmetic number, because the mean of its divisors is an integer number (1042158).

Almost surely, 2^21594096 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 21594096, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31264740).

21594096 is an abundant number, since it is smaller than the sum of its proper divisors (40935384).

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

21594096 is a wasteful number, since it uses less digits than its factorization.

21594096 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5214 (or 5205 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 36.

The square root of 21594096 is about 4646.9448027710. The cubic root of 21594096 is about 278.4699536856.

The spelling of 21594096 in words is "twenty-one million, five hundred ninety-four thousand, ninety-six".