20341321021 has 32 divisors (see below), whose sum is σ = 24635600640. Its totient is φ = 16430169600.

The previous prime is 20341321001. The next prime is 20341321051. The reversal of 20341321021 is 12012314302.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 20341321021 - 2¹³ = 20341312829 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20341321021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20341321001) 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 31 ways as a sum of consecutive naturals, for example, 1469151 + ... + 1482931.

It is an arithmetic number, because the mean of its divisors is an integer number (769862520).

Almost surely, 2^20341321021 is an apocalyptic number.

It is an amenable number.

20341321021 is a deficient number, since it is larger than the sum of its proper divisors (4294279619).

20341321021 is a wasteful number, since it uses less digits than its factorization.

20341321021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14005.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 20341321021 its reverse (12012314302), we get a palindrome (32353635323).

It can be divided in two parts, 2034132 and 1021, that added together give a triangular number (2035153 = T₂₀₁₇).

The spelling of 20341321021 in words is "twenty billion, three hundred forty-one million, three hundred twenty-one thousand, twenty-one".