25020534321 has 12 divisors (see below), whose sum is σ = 36142154100. Its totient is φ = 16679718240.

The previous prime is 25020534317. The next prime is 25020534347. The reversal of 25020534321 is 12343502052.

It is a happy number.

25020534321 is a `hidden beast` number, since 25 + 0 + 205 + 3 + 432 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 4316490000 + 20704044321 = 65700^2 + 143889^2 .

It is not a de Polignac number, because 25020534321 - 2² = 25020534317 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25020534821) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 387151 + ... + 447131.

It is an arithmetic number, because the mean of its divisors is an integer number (3011846175).

Almost surely, 2^25020534321 is an apocalyptic number.

It is an amenable number.

25020534321 is a deficient number, since it is larger than the sum of its proper divisors (11121619779).

25020534321 is a wasteful number, since it uses less digits than its factorization.

25020534321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106336 (or 106333 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 27.

The spelling of 25020534321 in words is "twenty-five billion, twenty million, five hundred thirty-four thousand, three hundred twenty-one".