20020420229 has 2 divisors, whose sum is σ = 20020420230. Its totient is φ = 20020420228.

The previous prime is 20020420223. The next prime is 20020420261. The reversal of 20020420229 is 92202402002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20009517025 + 10903204 = 141455^2 + 3302^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20020420229 is a prime.

It is a super-2 number, since 2×20020420229² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20020420223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10010210114 + 10010210115.

It is an arithmetic number, because the mean of its divisors is an integer number (10010210115).

Almost surely, 2^20020420229 is an apocalyptic number.

It is an amenable number.

20020420229 is a deficient number, since it is larger than the sum of its proper divisors (1).

20020420229 is an equidigital number, since it uses as much as digits as its factorization.

20020420229 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 23.

The spelling of 20020420229 in words is "twenty billion, twenty million, four hundred twenty thousand, two hundred twenty-nine".