20423133229 has 2 divisors, whose sum is σ = 20423133230. Its totient is φ = 20423133228.

The previous prime is 20423133221. The next prime is 20423133299. The reversal of 20423133229 is 92233132402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12661875625 + 7761257604 = 112525^2 + 88098^2 .

It is a cyclic number.

It is not a de Polignac number, because 20423133229 - 2³ = 20423133221 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20423133229.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20423133221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10211566614 + 10211566615.

It is an arithmetic number, because the mean of its divisors is an integer number (10211566615).

Almost surely, 2^20423133229 is an apocalyptic number.

It is an amenable number.

20423133229 is a deficient number, since it is larger than the sum of its proper divisors (1).

20423133229 is an equidigital number, since it uses as much as digits as its factorization.

20423133229 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 31.

The spelling of 20423133229 in words is "twenty billion, four hundred twenty-three million, one hundred thirty-three thousand, two hundred twenty-nine".