25421354340 has 96 divisors (see below), whose sum is σ = 72201507840. Its totient is φ = 6682416000.

The previous prime is 25421354339. The next prime is 25421354351. The reversal of 25421354340 is 4345312452.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1176151 + ... + 1197569.

It is an arithmetic number, because the mean of its divisors is an integer number (752099040).

Almost surely, 2^25421354340 is an apocalyptic number.

25421354340 is a gapful number since it is divisible by the number (20) 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 25421354340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36100753920).

25421354340 is an abundant number, since it is smaller than the sum of its proper divisors (46780153500).

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

25421354340 is a wasteful number, since it uses less digits than its factorization.

25421354340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21713 (or 21711 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 33.

Adding to 25421354340 its reverse (4345312452), we get a palindrome (29766666792).

The spelling of 25421354340 in words is "twenty-five billion, four hundred twenty-one million, three hundred fifty-four thousand, three hundred forty".