20253324 has 96 divisors (see below), whose sum is σ = 61641216. Its totient is φ = 5022720.

The previous prime is 20253241. The next prime is 20253347. The reversal of 20253324 is 42335202.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 20253324.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18019 + ... + 19109.

It is an arithmetic number, because the mean of its divisors is an integer number (642096).

Almost surely, 2^20253324 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 20253324, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30820608).

20253324 is an abundant number, since it is smaller than the sum of its proper divisors (41387892).

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

20253324 is a wasteful number, since it uses less digits than its factorization.

20253324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1135 (or 1133 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 21.

The square root of 20253324 is about 4500.3693181782. The cubic root of 20253324 is about 272.5830019579.

Adding to 20253324 its reverse (42335202), we get a palindrome (62588526).

The spelling of 20253324 in words is "twenty million, two hundred fifty-three thousand, three hundred twenty-four".