20021532 has 24 divisors (see below), whose sum is σ = 47510400. Its totient is φ = 6560496.

The previous prime is 20021527. The next prime is 20021537. The reversal of 20021532 is 23512002.

It is an interprime number because it is at equal distance from previous prime (20021527) and next prime (20021537).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20021537) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13432 + ... + 14847.

It is an arithmetic number, because the mean of its divisors is an integer number (1979600).

Almost surely, 2^20021532 is an apocalyptic number.

It is an amenable number.

20021532 is an abundant number, since it is smaller than the sum of its proper divisors (27488868).

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

20021532 is a wasteful number, since it uses less digits than its factorization.

20021532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28345 (or 28343 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 15.

The square root of 20021532 is about 4474.5426581942. The cubic root of 20021532 is about 271.5391381229.

Adding to 20021532 its reverse (23512002), we get a palindrome (43533534).

The spelling of 20021532 in words is "twenty million, twenty-one thousand, five hundred thirty-two".