20142432 has 120 divisors (see below), whose sum is σ = 62508600. Its totient is φ = 6345216.

The previous prime is 20142427. The next prime is 20142481. The reversal of 20142432 is 23424102.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 49044 + ... + 49452.

It is an arithmetic number, because the mean of its divisors is an integer number (520905).

Almost surely, 2^20142432 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 20142432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31254300).

20142432 is an abundant number, since it is smaller than the sum of its proper divisors (42366168).

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

20142432 is a wasteful number, since it uses less digits than its factorization.

20142432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 450 (or 433 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 20142432 is about 4488.0320854468. The cubic root of 20142432 is about 272.0846045925.

Adding to 20142432 its reverse (23424102), we get a palindrome (43566534).

The spelling of 20142432 in words is "twenty million, one hundred forty-two thousand, four hundred thirty-two".