25321313420 has 48 divisors (see below), whose sum is σ = 57408166368. Its totient is φ = 9326054400.

The previous prime is 25321313383. The next prime is 25321313429. The reversal of 25321313420 is 2431312352.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a self number, because there is not a number n which added to its sum of digits gives 25321313420.

It is not an unprimeable number, because it can be changed into a prime (25321313429) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17174 + ... + 225693.

It is an arithmetic number, because the mean of its divisors is an integer number (1196003466).

Almost surely, 2^25321313420 is an apocalyptic number.

25321313420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25321313420 is an abundant number, since it is smaller than the sum of its proper divisors (32086852948).

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

25321313420 is a wasteful number, since it uses less digits than its factorization.

25321313420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243290 (or 243288 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 26.

Adding to 25321313420 its reverse (2431312352), we get a palindrome (27752625772).

The spelling of 25321313420 in words is "twenty-five billion, three hundred twenty-one million, three hundred thirteen thousand, four hundred twenty".