20245400 has 48 divisors (see below), whose sum is σ = 53798640. Its totient is φ = 6940800.

The previous prime is 20245399. The next prime is 20245411. The reversal of 20245400 is 454202.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5831 + ... + 8630.

It is an arithmetic number, because the mean of its divisors is an integer number (1120805).

Almost surely, 2^20245400 is an apocalyptic number.

20245400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20245400 is an abundant number, since it is smaller than the sum of its proper divisors (33553240).

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

20245400 is a wasteful number, since it uses less digits than its factorization.

20245400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14484 (or 14475 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 17.

The square root of 20245400 is about 4499.4888598595. The cubic root of 20245400 is about 272.5474484613.

Adding to 20245400 its reverse (454202), we get a palindrome (20699602).

The spelling of 20245400 in words is "twenty million, two hundred forty-five thousand, four hundred".