20202221929 has 2 divisors, whose sum is σ = 20202221930. Its totient is φ = 20202221928.

The previous prime is 20202221891. The next prime is 20202221933. The reversal of 20202221929 is 92912220202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16679205904 + 3523016025 = 129148^2 + 59355^2 .

It is a cyclic number.

It is not a de Polignac number, because 20202221929 - 2²³ = 20193833321 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20202221929.

It is not a weakly prime, because it can be changed into another prime (20202221939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10101110964 + 10101110965.

It is an arithmetic number, because the mean of its divisors is an integer number (10101110965).

Almost surely, 2^20202221929 is an apocalyptic number.

It is an amenable number.

20202221929 is a deficient number, since it is larger than the sum of its proper divisors (1).

20202221929 is an equidigital number, since it uses as much as digits as its factorization.

20202221929 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 31.

The spelling of 20202221929 in words is "twenty billion, two hundred two million, two hundred twenty-one thousand, nine hundred twenty-nine".