25431455020 has 12 divisors (see below), whose sum is σ = 53406055584. Its totient is φ = 10172582000.

The previous prime is 25431455017. The next prime is 25431455029. The reversal of 25431455020 is 2055413452.

It is not an unprimeable number, because it can be changed into a prime (25431455029) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 635786356 + ... + 635786395.

It is an arithmetic number, because the mean of its divisors is an integer number (4450504632).

Almost surely, 2^25431455020 is an apocalyptic number.

25431455020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25431455020 is an abundant number, since it is smaller than the sum of its proper divisors (27974600564).

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

25431455020 is a wasteful number, since it uses less digits than its factorization.

25431455020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1271572760 (or 1271572758 counting only the distinct ones).

The product of its (nonzero) digits is 24000, while the sum is 31.

Adding to 25431455020 its reverse (2055413452), we get a palindrome (27486868472).

The spelling of 25431455020 in words is "twenty-five billion, four hundred thirty-one million, four hundred fifty-five thousand, twenty".