25043244420 has 48 divisors (see below), whose sum is σ = 70205808960. Its totient is φ = 6670129536.

The previous prime is 25043244403. The next prime is 25043244431. The reversal of 25043244420 is 2444234052.

It is a super-2 number, since 2×25043244420² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

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, 202002 + ... + 301481.

It is an arithmetic number, because the mean of its divisors is an integer number (1462621020).

Almost surely, 2^25043244420 is an apocalyptic number.

25043244420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25043244420 is an abundant number, since it is smaller than the sum of its proper divisors (45162564540).

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

25043244420 is a wasteful number, since it uses less digits than its factorization.

25043244420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 504324 (or 504322 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 30.

Adding to 25043244420 its reverse (2444234052), we get a palindrome (27487478472).

The spelling of 25043244420 in words is "twenty-five billion, forty-three million, two hundred forty-four thousand, four hundred twenty".