20420229069 has 6 divisors (see below), whose sum is σ = 29495886446. Its totient is φ = 13613486040.

The previous prime is 20420229019. The next prime is 20420229083. The reversal of 20420229069 is 96092202402.

It is a happy number.

20420229069 is a `hidden beast` number, since 2 + 0 + 420 + 229 + 0 + 6 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 11976456969 + 8443772100 = 109437^2 + 91890^2 .

It is not a de Polignac number, because 20420229069 - 2⁹ = 20420228557 is a prime.

It is a super-2 number, since 2×20420229069² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20420229019) 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 in 5 ways as a sum of consecutive naturals, for example, 1134457162 + ... + 1134457179.

Almost surely, 2^20420229069 is an apocalyptic number.

It is an amenable number.

20420229069 is a deficient number, since it is larger than the sum of its proper divisors (9075657377).

20420229069 is a wasteful number, since it uses less digits than its factorization.

20420229069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2268914347 (or 2268914344 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The spelling of 20420229069 in words is "twenty billion, four hundred twenty million, two hundred twenty-nine thousand, sixty-nine".