20323428 has 24 divisors (see below), whose sum is σ = 47496960. Its totient is φ = 6763680.

The previous prime is 20323427. The next prime is 20323441. The reversal of 20323428 is 82432302.

It is a junction number, because it is equal to n+sod(n) for n = 20323398 and 20323407.

It is not an unprimeable number, because it can be changed into a prime (20323423) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 11038 + ... + 12746.

It is an arithmetic number, because the mean of its divisors is an integer number (1979040).

Almost surely, 2^20323428 is an apocalyptic number.

It is an amenable number.

20323428 is an abundant number, since it is smaller than the sum of its proper divisors (27173532).

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

20323428 is a wasteful number, since it uses less digits than its factorization.

20323428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2707 (or 2705 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

The square root of 20323428 is about 4508.1512840631. The cubic root of 20323428 is about 272.8971422144.

It can be divided in two parts, 2032 and 3428, that multiplied together give a palindrome (6965696).

The spelling of 20323428 in words is "twenty million, three hundred twenty-three thousand, four hundred twenty-eight".