20023201229 has 2 divisors, whose sum is σ = 20023201230. Its totient is φ = 20023201228.

The previous prime is 20023201157. The next prime is 20023201271. The reversal of 20023201229 is 92210232002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19654638025 + 368563204 = 140195^2 + 19198^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20023201229 is a prime.

It is a super-2 number, since 2×20023201229² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20023201279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10011600614 + 10011600615.

It is an arithmetic number, because the mean of its divisors is an integer number (10011600615).

Almost surely, 2^20023201229 is an apocalyptic number.

It is an amenable number.

20023201229 is a deficient number, since it is larger than the sum of its proper divisors (1).

20023201229 is an equidigital number, since it uses as much as digits as its factorization.

20023201229 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 23.

The spelling of 20023201229 in words is "twenty billion, twenty-three million, two hundred one thousand, two hundred twenty-nine".