25021423040 has 28 divisors (see below), whose sum is σ = 59582264376. Its totient is φ = 10008569088.

The previous prime is 25021423027. The next prime is 25021423061. The reversal of 25021423040 is 4032412052.

It is a happy number.

It is a super-2 number, since 2×25021423040² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 25021422997 and 25021423015.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39095654 + ... + 39096293.

Almost surely, 2^25021423040 is an apocalyptic number.

25021423040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25021423040 is an abundant number, since it is smaller than the sum of its proper divisors (34560841336).

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

25021423040 is an equidigital number, since it uses as much as digits as its factorization.

25021423040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78191964 (or 78191954 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 23.

Adding to 25021423040 its reverse (4032412052), we get a palindrome (29053835092).

The spelling of 25021423040 in words is "twenty-five billion, twenty-one million, four hundred twenty-three thousand, forty".