25424030020 has 24 divisors (see below), whose sum is σ = 53517298968. Its totient is φ = 10145452800.

The previous prime is 25424029993. The next prime is 25424030033. The reversal of 25424030020 is 2003042452.

It can be written as a sum of positive squares in 4 ways, for example, as 388562944 + 25035467076 = 19712^2 + 158226^2 .

It is a super-2 number, since 2×25424030020² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 25424029973 and 25424030000.

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 7 ways as a sum of consecutive naturals, for example, 1501321 + ... + 1518160.

It is an arithmetic number, because the mean of its divisors is an integer number (2229887457).

Almost surely, 2^25424030020 is an apocalyptic number.

25424030020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25424030020 is an abundant number, since it is smaller than the sum of its proper divisors (28093268948).

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

25424030020 is a wasteful number, since it uses less digits than its factorization.

25424030020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3019911 (or 3019909 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 22.

Adding to 25424030020 its reverse (2003042452), we get a palindrome (27427072472).

The spelling of 25424030020 in words is "twenty-five billion, four hundred twenty-four million, thirty thousand, twenty".