25442230021 has 16 divisors (see below), whose sum is σ = 28047204864. Its totient is φ = 22932129024.

The previous prime is 25442230013. The next prime is 25442230049. The reversal of 25442230021 is 12003224452.

It is a cyclic number.

It is not a de Polignac number, because 25442230021 - 2³ = 25442230013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25442230621) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 216480 + ... + 312646.

It is an arithmetic number, because the mean of its divisors is an integer number (1752950304).

Almost surely, 2^25442230021 is an apocalyptic number.

It is an amenable number.

25442230021 is a deficient number, since it is larger than the sum of its proper divisors (2604974843).

25442230021 is a wasteful number, since it uses less digits than its factorization.

25442230021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96660.

The product of its (nonzero) digits is 3840, while the sum is 25.

Adding to 25442230021 its reverse (12003224452), we get a palindrome (37445454473).

The spelling of 25442230021 in words is "twenty-five billion, four hundred forty-two million, two hundred thirty thousand, twenty-one".