20652399612 has 108 divisors (see below), whose sum is σ = 59854878720. Its totient is φ = 5980755456.

The previous prime is 20652399611. The next prime is 20652399613. The reversal of 20652399612 is 21699325602.

20652399612 is a `hidden beast` number, since 2 + 0 + 6 + 5 + 23 + 9 + 9 + 612 = 666.

It is an interprime number because it is at equal distance from previous prime (20652399611) and next prime (20652399613).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20652399611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 3589 + ... + 203267.

It is an arithmetic number, because the mean of its divisors is an integer number (554211840).

Almost surely, 2^20652399612 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20652399612, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29927439360).

20652399612 is an abundant number, since it is smaller than the sum of its proper divisors (39202479108).

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

20652399612 is a wasteful number, since it uses less digits than its factorization.

20652399612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199732 (or 199714 counting only the distinct ones).

The product of its (nonzero) digits is 349920, while the sum is 45.

The spelling of 20652399612 in words is "twenty billion, six hundred fifty-two million, three hundred ninety-nine thousand, six hundred twelve".