21469392 has 180 divisors, whose sum is σ = 73700640. Its totient is φ = 5712768.

The previous prime is 21469379. The next prime is 21469397. The reversal of 21469392 is 29396412.

It is a hoax number, since the sum of its digits (36) 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 (36).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21469397) 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 35 ways as a sum of consecutive naturals, for example, 363859 + ... + 363917.

It is an arithmetic number, because the mean of its divisors is an integer number (409448).

Almost surely, 2^21469392 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 21469392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36850320).

21469392 is an abundant number, since it is smaller than the sum of its proper divisors (52231248).

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

21469392 is a wasteful number, since it uses less digits than its factorization.

21469392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118 (or 90 counting only the distinct ones).

The product of its digits is 23328, while the sum is 36.

The square root of 21469392 is about 4633.5075267016. The cubic root of 21469392 is about 277.9328720139.

The spelling of 21469392 in words is "twenty-one million, four hundred sixty-nine thousand, three hundred ninety-two".