20652265621 has 16 divisors (see below), whose sum is σ = 22908941440. Its totient is φ = 18496900800.

The previous prime is 20652265609. The next prime is 20652265649. The reversal of 20652265621 is 12656225602.

It is a cyclic number.

It is not a de Polignac number, because 20652265621 - 2¹⁷ = 20652134549 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20652260621) 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 15 ways as a sum of consecutive naturals, for example, 37926 + ... + 206743.

It is an arithmetic number, because the mean of its divisors is an integer number (1431808840).

Almost surely, 2^20652265621 is an apocalyptic number.

It is an amenable number.

20652265621 is a deficient number, since it is larger than the sum of its proper divisors (2256675819).

20652265621 is a wasteful number, since it uses less digits than its factorization.

20652265621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244876.

The product of its (nonzero) digits is 86400, while the sum is 37.

The spelling of 20652265621 in words is "twenty billion, six hundred fifty-two million, two hundred sixty-five thousand, six hundred twenty-one".