20281111319 has 6 divisors (see below), whose sum is σ = 23592313224. Its totient is φ = 17383809660.

The previous prime is 20281111313. The next prime is 20281111393. The reversal of 20281111319 is 91311118202.

It is a happy number.

It is not a de Polignac number, because 20281111319 - 2²⁸ = 20012675863 is a prime.

It is a super-2 number, since 2×20281111319² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20281111291 and 20281111300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20281111313) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 206950067 + ... + 206950164.

It is an arithmetic number, because the mean of its divisors is an integer number (3932052204).

Almost surely, 2^20281111319 is an apocalyptic number.

20281111319 is a deficient number, since it is larger than the sum of its proper divisors (3311201905).

20281111319 is an equidigital number, since it uses as much as digits as its factorization.

20281111319 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 413900245 (or 413900238 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 29.

The spelling of 20281111319 in words is "twenty billion, two hundred eighty-one million, one hundred eleven thousand, three hundred nineteen".