21092832 has 48 divisors (see below), whose sum is σ = 61523280. Its totient is φ = 7030656.

The previous prime is 21092821. The next prime is 21092843. The reversal of 21092832 is 23829012.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (21092821) and next prime (21092843).

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

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 21092796 and 21092805.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 11343 + ... + 13070.

It is an arithmetic number, because the mean of its divisors is an integer number (1281735).

Almost surely, 2^21092832 is an apocalyptic number.

It is an amenable number.

21092832 is an abundant number, since it is smaller than the sum of its proper divisors (40430448).

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

21092832 is a wasteful number, since it uses less digits than its factorization.

21092832 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24432 (or 24418 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 21092832 is about 4592.6933274496. The cubic root of 21092832 is about 276.2983541136.

The spelling of 21092832 in words is "twenty-one million, ninety-two thousand, eight hundred thirty-two".