25220004000 has 96 divisors (see below), whose sum is σ = 82620772416. Its totient is φ = 6725331200.

The previous prime is 25220003993. The next prime is 25220004031. The reversal of 25220004000 is 40002252.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (15).

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 15 ways as a sum of consecutive naturals, for example, 1038834 + ... + 1062833.

It is an arithmetic number, because the mean of its divisors is an integer number (860633046).

Almost surely, 2^25220004000 is an apocalyptic number.

25220004000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25220004000 is an abundant number, since it is smaller than the sum of its proper divisors (57400768416).

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

25220004000 is a wasteful number, since it uses less digits than its factorization.

25220004000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2101695 (or 2101677 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 15.

Adding to 25220004000 its reverse (40002252), we get a palindrome (25260006252).

The spelling of 25220004000 in words is "twenty-five billion, two hundred twenty million, four thousand".