20232540 has 36 divisors (see below), whose sum is σ = 61372584. Its totient is φ = 5395296.

The previous prime is 20232539. The next prime is 20232547. The reversal of 20232540 is 4523202.

It is a tau number, because it is divible by the number of its divisors (36).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20232547) 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 11 ways as a sum of consecutive naturals, for example, 56022 + ... + 56381.

It is an arithmetic number, because the mean of its divisors is an integer number (1704794).

Almost surely, 2^20232540 is an apocalyptic number.

20232540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20232540 is an abundant number, since it is smaller than the sum of its proper divisors (41140044).

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

20232540 is a wasteful number, since it uses less digits than its factorization.

20232540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112418 (or 112413 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 18.

The square root of 20232540 is about 4498.0595816418. The cubic root of 20232540 is about 272.4897283113.

Adding to 20232540 its reverse (4523202), we get a palindrome (24755742).

The spelling of 20232540 in words is "twenty million, two hundred thirty-two thousand, five hundred forty".