20253750 has 80 divisors (see below), whose sum is σ = 55332288. Its totient is φ = 4900000.

The previous prime is 20253733. The next prime is 20253787. The reversal of 20253750 is 5735202.

It is a self number, because there is not a number n which added to its sum of digits gives 20253750.

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 39 ways as a sum of consecutive naturals, for example, 41005 + ... + 41495.

Almost surely, 2^20253750 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20253750, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27666144).

20253750 is an abundant number, since it is smaller than the sum of its proper divisors (35078538).

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

20253750 is a wasteful number, since it uses less digits than its factorization.

20253750 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 527 (or 512 counting only the distinct ones).

The product of its (nonzero) digits is 2100, while the sum is 24.

The square root of 20253750 is about 4500.4166473783. The cubic root of 20253750 is about 272.5849130770.

Adding to 20253750 its reverse (5735202), we get a palindrome (25988952).

It can be divided in two parts, 2025 and 3750, that added together give a palindrome (5775).

The spelling of 20253750 in words is "twenty million, two hundred fifty-three thousand, seven hundred fifty".