20231532 has 60 divisors (see below), whose sum is σ = 54214776. Its totient is φ = 6575040.

The previous prime is 20231527. The next prime is 20231539. The reversal of 20231532 is 23513202.

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

It is not an unprimeable number, because it can be changed into a prime (20231539) 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 19 ways as a sum of consecutive naturals, for example, 12523 + ... + 14045.

Almost surely, 2^20231532 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 20231532, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27107388).

20231532 is an abundant number, since it is smaller than the sum of its proper divisors (33983244).

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

20231532 is a wasteful number, since it uses less digits than its factorization.

20231532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1580 (or 1569 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 20231532 is about 4497.9475319305. The cubic root of 20231532 is about 272.4852030234.

Adding to 20231532 its reverse (23513202), we get a palindrome (43744734).

The spelling of 20231532 in words is "twenty million, two hundred thirty-one thousand, five hundred thirty-two".