20390590269 has 32 divisors (see below), whose sum is σ = 36024791040. Its totient is φ = 11145164976.

The previous prime is 20390590249. The next prime is 20390590273. The reversal of 20390590269 is 96209509302.

20390590269 is a `hidden beast` number, since 2 + 0 + 39 + 0 + 590 + 26 + 9 = 666.

It is not a de Polignac number, because 20390590269 - 2²⁰ = 20389541693 is a prime.

It is a super-2 number, since 2×20390590269² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20390590249) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2341017 + ... + 2349710.

It is an arithmetic number, because the mean of its divisors is an integer number (1125774720).

Almost surely, 2^20390590269 is an apocalyptic number.

It is an amenable number.

20390590269 is a deficient number, since it is larger than the sum of its proper divisors (15634200771).

20390590269 is a wasteful number, since it uses less digits than its factorization.

20390590269 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4690766 (or 4690760 counting only the distinct ones).

The product of its (nonzero) digits is 262440, while the sum is 45.

The spelling of 20390590269 in words is "twenty billion, three hundred ninety million, five hundred ninety thousand, two hundred sixty-nine".