20253504 has 56 divisors (see below), whose sum is σ = 55055008. Its totient is φ = 6566400.

The previous prime is 20253469. The next prime is 20253521. The reversal of 20253504 is 40535202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5679 + ... + 8529.

Almost surely, 2^20253504 is an apocalyptic number.

20253504 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20253504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27527504).

20253504 is an abundant number, since it is smaller than the sum of its proper divisors (34801504).

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

20253504 is a wasteful number, since it uses less digits than its factorization.

20253504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2903 (or 2893 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 21.

The square root of 20253504 is about 4500.3893164925. The cubic root of 20253504 is about 272.5838094763.

Adding to 20253504 its reverse (40535202), we get a palindrome (60788706).

The spelling of 20253504 in words is "twenty million, two hundred fifty-three thousand, five hundred four".