20213321023 has 16 divisors (see below), whose sum is σ = 23201593344. Its totient is φ = 17250370560.

The previous prime is 20213320987. The next prime is 20213321033. The reversal of 20213321023 is 32012331202.

It is a cyclic number.

It is not a de Polignac number, because 20213321023 - 2¹⁷ = 20213189951 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20213321033) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1656063 + ... + 1668223.

It is an arithmetic number, because the mean of its divisors is an integer number (1450099584).

Almost surely, 2^20213321023 is an apocalyptic number.

20213321023 is a deficient number, since it is larger than the sum of its proper divisors (2988272321).

20213321023 is a wasteful number, since it uses less digits than its factorization.

20213321023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13182.

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 20213321023 its reverse (32012331202), we get a palindrome (52225652225).

The spelling of 20213321023 in words is "twenty billion, two hundred thirteen million, three hundred twenty-one thousand, twenty-three".