25204204242 has 32 divisors (see below), whose sum is σ = 64010678400. Its totient is φ = 7201201104.

The previous prime is 25204204153. The next prime is 25204204247. The reversal of 25204204242 is 24240240252.

It is a super-2 number, since 2×25204204242² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (25204204247) 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, 33338517 + ... + 33339272.

It is an arithmetic number, because the mean of its divisors is an integer number (2000333700).

Almost surely, 2^25204204242 is an apocalyptic number.

25204204242 is an abundant number, since it is smaller than the sum of its proper divisors (38806474158).

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

25204204242 is a wasteful number, since it uses less digits than its factorization.

25204204242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66677807 (or 66677801 counting only the distinct ones).

The product of its (nonzero) digits is 10240, while the sum is 27.

Adding to 25204204242 its reverse (24240240252), we get a palindrome (49444444494).

The spelling of 25204204242 in words is "twenty-five billion, two hundred four million, two hundred four thousand, two hundred forty-two".