25423821892 has 36 divisors (see below), whose sum is σ = 51875338620. Its totient is φ = 10870723584.

The previous prime is 25423821887. The next prime is 25423821919. The reversal of 25423821892 is 29812832452.

It can be written as a sum of positive squares in 2 ways, for example, as 4907843136 + 20515978756 = 70056^2 + 143234^2 .

It is a super-2 number, since 2×25423821892² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 64917 + ... + 234652.

Almost surely, 2^25423821892 is an apocalyptic number.

It is an amenable number.

25423821892 is an abundant number, since it is smaller than the sum of its proper divisors (26451516728).

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

25423821892 is a wasteful number, since it uses less digits than its factorization.

25423821892 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 300020 (or 300011 counting only the distinct ones).

The product of its digits is 552960, while the sum is 46.

The spelling of 25423821892 in words is "twenty-five billion, four hundred twenty-three million, eight hundred twenty-one thousand, eight hundred ninety-two".