20393632 has 48 divisors (see below), whose sum is σ = 46230912. Its totient is φ = 8674560.

The previous prime is 20393603. The next prime is 20393651. The reversal of 20393632 is 23639302.

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 20393632.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40293 + ... + 40795.

It is an arithmetic number, because the mean of its divisors is an integer number (963144).

Almost surely, 2^20393632 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 20393632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23115456).

20393632 is an abundant number, since it is smaller than the sum of its proper divisors (25837280).

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

20393632 is a wasteful number, since it uses less digits than its factorization.

20393632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 701 (or 693 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 28.

The square root of 20393632 is about 4515.9309117833. The cubic root of 20393632 is about 273.2110074616.

It can be divided in two parts, 20393 and 632, that added together give a square (21025 = 145²).

The spelling of 20393632 in words is "twenty million, three hundred ninety-three thousand, six hundred thirty-two".