20999484223 has 2 divisors, whose sum is σ = 20999484224. Its totient is φ = 20999484222.

The previous prime is 20999484221. The next prime is 20999484241. The reversal of 20999484223 is 32248499902.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20999484223 - 2¹ = 20999484221 is a prime.

Together with 20999484221, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20999484221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10499742111 + 10499742112.

It is an arithmetic number, because the mean of its divisors is an integer number (10499742112).

Almost surely, 2^20999484223 is an apocalyptic number.

20999484223 is a deficient number, since it is larger than the sum of its proper divisors (1).

20999484223 is an equidigital number, since it uses as much as digits as its factorization.

20999484223 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2239488, while the sum is 52.

The spelling of 20999484223 in words is "twenty billion, nine hundred ninety-nine million, four hundred eighty-four thousand, two hundred twenty-three".