20920032 has 120 divisors (see below), whose sum is σ = 70375536. Its totient is φ = 5971968.

The previous prime is 20920019. The next prime is 20920033. The reversal of 20920032 is 23002902.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 20919987 and 20920014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20920033) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 17568 + ... + 18720.

Almost surely, 2^20920032 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 20920032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35187768).

20920032 is an abundant number, since it is smaller than the sum of its proper divisors (49455504).

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

20920032 is a wasteful number, since it uses less digits than its factorization.

20920032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1182 (or 1165 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 20920032 is about 4573.8421485661. The cubic root of 20920032 is about 275.5417727334.

Adding to 20920032 its reverse (23002902), we get a palindrome (43922934).

The spelling of 20920032 in words is "twenty million, nine hundred twenty thousand, thirty-two".