20313432 has 96 divisors (see below), whose sum is σ = 59904000. Its totient is φ = 6194880.

The previous prime is 20313421. The next prime is 20313437. The reversal of 20313432 is 23431302.

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 (20313437) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 42169 + ... + 42647.

It is an arithmetic number, because the mean of its divisors is an integer number (624000).

Almost surely, 2^20313432 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 20313432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29952000).

20313432 is an abundant number, since it is smaller than the sum of its proper divisors (39590568).

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

20313432 is a wasteful number, since it uses less digits than its factorization.

20313432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 541 (or 534 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

The square root of 20313432 is about 4507.0424892606. The cubic root of 20313432 is about 272.8523937401.

Adding to 20313432 its reverse (23431302), we get a palindrome (43744734).

The spelling of 20313432 in words is "twenty million, three hundred thirteen thousand, four hundred thirty-two".