20671885269 has 12 divisors (see below), whose sum is σ = 34125017056. Its totient is φ = 11812505832.

The previous prime is 20671885219. The next prime is 20671885277. The reversal of 20671885269 is 96258817602.

It is not a de Polignac number, because 20671885269 - 2¹³ = 20671877077 is a prime.

It is a super-2 number, since 2×20671885269² (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 (20671885219) 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 11 ways as a sum of consecutive naturals, for example, 164062519 + ... + 164062644.

Almost surely, 2^20671885269 is an apocalyptic number.

It is an amenable number.

20671885269 is a deficient number, since it is larger than the sum of its proper divisors (13453131787).

20671885269 is a wasteful number, since it uses less digits than its factorization.

20671885269 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 328125176 (or 328125173 counting only the distinct ones).

The product of its (nonzero) digits is 2903040, while the sum is 54.

The spelling of 20671885269 in words is "twenty billion, six hundred seventy-one million, eight hundred eighty-five thousand, two hundred sixty-nine".