25431401420 has 48 divisors (see below), whose sum is σ = 55543924128. Its totient is φ = 9773084160.

The previous prime is 25431401393. The next prime is 25431401453. The reversal of 25431401420 is 2410413452.

It is a self number, because there is not a number n which added to its sum of digits gives 25431401420.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 189929 + ... + 294848.

It is an arithmetic number, because the mean of its divisors is an integer number (1157165086).

Almost surely, 2^25431401420 is an apocalyptic number.

25431401420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25431401420 is an abundant number, since it is smaller than the sum of its proper divisors (30112522708).

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

25431401420 is a wasteful number, since it uses less digits than its factorization.

25431401420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 484890 (or 484888 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 26.

Adding to 25431401420 its reverse (2410413452), we get a palindrome (27841814872).

The spelling of 25431401420 in words is "twenty-five billion, four hundred thirty-one million, four hundred one thousand, four hundred twenty".