25021650330 has 128 divisors (see below), whose sum is σ = 68296919040. Its totient is φ = 6516357120.

The previous prime is 25021650307. The next prime is 25021650337. The reversal of 25021650330 is 3305612052.

25021650330 is a `hidden beast` number, since 2 + 5 + 0 + 2 + 1 + 650 + 3 + 3 + 0 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 25021650294 and 25021650303.

It is not an unprimeable number, because it can be changed into a prime (25021650337) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3187210 + ... + 3195050.

It is an arithmetic number, because the mean of its divisors is an integer number (533569680).

Almost surely, 2^25021650330 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25021650330, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34148459520).

25021650330 is an abundant number, since it is smaller than the sum of its proper divisors (43275268710).

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

25021650330 is a wasteful number, since it uses less digits than its factorization.

25021650330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8133 (or 8127 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 27.

The spelling of 25021650330 in words is "twenty-five billion, twenty-one million, six hundred fifty thousand, three hundred thirty".