20315532 has 24 divisors (see below), whose sum is σ = 49464576. Its totient is φ = 6477328.

The previous prime is 20315531. The next prime is 20315543. The reversal of 20315532 is 23551302.

It is a junction number, because it is equal to n+sod(n) for n = 20315499 and 20315508.

It is not an unprimeable number, because it can be changed into a prime (20315531) 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, 36528 + ... + 37079.

It is an arithmetic number, because the mean of its divisors is an integer number (2061024).

Almost surely, 2^20315532 is an apocalyptic number.

It is an amenable number.

20315532 is an abundant number, since it is smaller than the sum of its proper divisors (29149044).

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

20315532 is a wasteful number, since it uses less digits than its factorization.

20315532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73637 (or 73635 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 21.

The square root of 20315532 is about 4507.2754519776. The cubic root of 20315532 is about 272.8617958979.

Adding to 20315532 its reverse (23551302), we get a palindrome (43866834).

The spelling of 20315532 in words is "twenty million, three hundred fifteen thousand, five hundred thirty-two".