20336087021 has 8 divisors (see below), whose sum is σ = 21559358520. Its totient is φ = 19115819008.

The previous prime is 20336086997. The next prime is 20336087063. The reversal of 20336087021 is 12078063302.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 7337806921 + 12998280100 = 85661^2 + 114010^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20336087021 - 2²⁶ = 20268978157 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20336087221) 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 7 ways as a sum of consecutive naturals, for example, 736916 + ... + 764013.

It is an arithmetic number, because the mean of its divisors is an integer number (2694919815).

Almost surely, 2^20336087021 is an apocalyptic number.

It is an amenable number.

20336087021 is a deficient number, since it is larger than the sum of its proper divisors (1223271499).

20336087021 is a wasteful number, since it uses less digits than its factorization.

20336087021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1501743.

The product of its (nonzero) digits is 12096, while the sum is 32.

The spelling of 20336087021 in words is "twenty billion, three hundred thirty-six million, eighty-seven thousand, twenty-one".