21492352 has 96 divisors (see below), whose sum is σ = 52607520. Its totient is φ = 8564736.

The previous prime is 21492349. The next prime is 21492353. The reversal of 21492352 is 25329412.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a self number, because there is not a number n which added to its sum of digits gives 21492352.

It is not an unprimeable number, because it can be changed into a prime (21492353) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 258903 + ... + 258985.

It is an arithmetic number, because the mean of its divisors is an integer number (547995).

Almost surely, 2^21492352 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 21492352, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26303760).

21492352 is an abundant number, since it is smaller than the sum of its proper divisors (31115168).

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

21492352 is an equidigital number, since it uses as much as digits as its factorization.

21492352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138 (or 109 counting only the distinct ones).

The product of its digits is 4320, while the sum is 28.

The square root of 21492352 is about 4635.9844693441. The cubic root of 21492352 is about 278.0319132489.

The spelling of 21492352 in words is "twenty-one million, four hundred ninety-two thousand, three hundred fifty-two".