21196032 has 144 divisors (see below), whose sum is σ = 66618048. Its totient is φ = 5898240.

The previous prime is 21196009. The next prime is 21196067. The reversal of 21196032 is 23069112.

It is a hoax number, since the sum of its digits (24) 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 (24).

It is a junction number, because it is equal to n+sod(n) for n = 21195993 and 21196011.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 109728 + ... + 109920.

Almost surely, 2^21196032 is an apocalyptic number.

21196032 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21196032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33309024).

21196032 is an abundant number, since it is smaller than the sum of its proper divisors (45422016).

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

21196032 is a wasteful number, since it uses less digits than its factorization.

21196032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 236 (or 222 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 24.

The square root of 21196032 is about 4603.9148558591. The cubic root of 21196032 is about 276.7482322693.

Subtracting 21196032 from its reverse (23069112), we obtain a triangular number (1873080 = T₁₉₃₅).

The spelling of 21196032 in words is "twenty-one million, one hundred ninety-six thousand, thirty-two".