30025250021 has 8 divisors (see below), whose sum is σ = 33449881080. Its totient is φ = 26759904192.

The previous prime is 30025249999. The next prime is 30025250039. The reversal of 30025250021 is 12005252003.

It can be written as a sum of positive squares in 4 ways, for example, as 65448100 + 29959801921 = 8090^2 + 173089^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30025250021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30025249975 and 30025250002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30025250081) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39820910 + ... + 39821663.

It is an arithmetic number, because the mean of its divisors is an integer number (4181235135).

Almost surely, 2^30025250021 is an apocalyptic number.

It is an amenable number.

30025250021 is a deficient number, since it is larger than the sum of its proper divisors (3424631059).

30025250021 is a wasteful number, since it uses less digits than its factorization.

30025250021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79642615.

The product of its (nonzero) digits is 600, while the sum is 20.

The spelling of 30025250021 in words is "thirty billion, twenty-five million, two hundred fifty thousand, twenty-one".