20620341621 has 24 divisors (see below), whose sum is σ = 32535700704. Its totient is φ = 12480622560.

The previous prime is 20620341619. The next prime is 20620341659. The reversal of 20620341621 is 12614302602.

20620341621 is a `hidden beast` number, since 2 + 0 + 6 + 2 + 0 + 34 + 1 + 621 = 666.

It is not a de Polignac number, because 20620341621 - 2¹ = 20620341619 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20620341661) 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 23 ways as a sum of consecutive naturals, for example, 62631 + ... + 212516.

It is an arithmetic number, because the mean of its divisors is an integer number (1355654196).

Almost surely, 2^20620341621 is an apocalyptic number.

It is an amenable number.

20620341621 is a deficient number, since it is larger than the sum of its proper divisors (11915359083).

20620341621 is a wasteful number, since it uses less digits than its factorization.

20620341621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275921 (or 275918 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The spelling of 20620341621 in words is "twenty billion, six hundred twenty million, three hundred forty-one thousand, six hundred twenty-one".