20964432 has 80 divisors (see below), whose sum is σ = 56964608. Its totient is φ = 6635520.

The previous prime is 20964409. The next prime is 20964439. The reversal of 20964432 is 23446902.

It is a self number, because there is not a number n which added to its sum of digits gives 20964432.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20964439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 108528 + ... + 108720.

Almost surely, 2^20964432 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 20964432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28482304).

20964432 is an abundant number, since it is smaller than the sum of its proper divisors (36000176).

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

20964432 is a wasteful number, since it uses less digits than its factorization.

20964432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 308 (or 302 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 30.

The square root of 20964432 is about 4578.6932633667. The cubic root of 20964432 is about 275.7365686407.

The spelling of 20964432 in words is "twenty million, nine hundred sixty-four thousand, four hundred thirty-two".