20320621011 has 32 divisors (see below), whose sum is σ = 31743532800. Its totient is φ = 12812022720.

The previous prime is 20320620953. The next prime is 20320621019. The reversal of 20320621011 is 11012602302.

20320621011 is a `hidden beast` number, since 2 + 0 + 32 + 0 + 621 + 0 + 11 = 666.

It is not a de Polignac number, because 20320621011 - 2¹¹ = 20320618963 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20320621019) 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 31 ways as a sum of consecutive naturals, for example, 267391 + ... + 334871.

It is an arithmetic number, because the mean of its divisors is an integer number (991985400).

Almost surely, 2^20320621011 is an apocalyptic number.

20320621011 is a deficient number, since it is larger than the sum of its proper divisors (11422911789).

20320621011 is a wasteful number, since it uses less digits than its factorization.

20320621011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68096 (or 68090 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The spelling of 20320621011 in words is "twenty billion, three hundred twenty million, six hundred twenty-one thousand, eleven".