25553420 has 24 divisors (see below), whose sum is σ = 54676944. Its totient is φ = 10028096.

The previous prime is 25553417. The next prime is 25553447. The reversal of 25553420 is 2435552.

It is a self number, because there is not a number n which added to its sum of digits gives 25553420.

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 7 ways as a sum of consecutive naturals, for example, 10994 + ... + 13113.

It is an arithmetic number, because the mean of its divisors is an integer number (2278206).

Almost surely, 2^25553420 is an apocalyptic number.

25553420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25553420 is an abundant number, since it is smaller than the sum of its proper divisors (29123524).

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

25553420 is a wasteful number, since it uses less digits than its factorization.

25553420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24169 (or 24167 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 26.

The square root of 25553420 is about 5055.0390700765. The cubic root of 25553420 is about 294.5436590880.

Adding to 25553420 its reverse (2435552), we get a palindrome (27988972).

The spelling of 25553420 in words is "twenty-five million, five hundred fifty-three thousand, four hundred twenty".