20224699021 has 2 divisors, whose sum is σ = 20224699022. Its totient is φ = 20224699020.

The previous prime is 20224698961. The next prime is 20224699037. The reversal of 20224699021 is 12099642202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20217996100 + 6702921 = 142190^2 + 2589^2 .

It is a cyclic number.

It is not a de Polignac number, because 20224699021 - 2⁹ = 20224698509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20224690021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10112349510 + 10112349511.

It is an arithmetic number, because the mean of its divisors is an integer number (10112349511).

Almost surely, 2^20224699021 is an apocalyptic number.

It is an amenable number.

20224699021 is a deficient number, since it is larger than the sum of its proper divisors (1).

20224699021 is an equidigital number, since it uses as much as digits as its factorization.

20224699021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31104, while the sum is 37.

The spelling of 20224699021 in words is "twenty billion, two hundred twenty-four million, six hundred ninety-nine thousand, twenty-one".