20283499391 has 12 divisors (see below), whose sum is σ = 21568007472. Its totient is φ = 19071591168.

The previous prime is 20283499387. The next prime is 20283499409. The reversal of 20283499391 is 19399438202.

It is not a de Polignac number, because 20283499391 - 2² = 20283499387 is a prime.

It is a super-2 number, since 2×20283499391² (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 (20283499321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 264566 + ... + 332508.

It is an arithmetic number, because the mean of its divisors is an integer number (1797333956).

Almost surely, 2^20283499391 is an apocalyptic number.

20283499391 is a deficient number, since it is larger than the sum of its proper divisors (1284508081).

20283499391 is a wasteful number, since it uses less digits than its factorization.

20283499391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69010 (or 68993 counting only the distinct ones).

The product of its (nonzero) digits is 839808, while the sum is 50.

The spelling of 20283499391 in words is "twenty billion, two hundred eighty-three million, four hundred ninety-nine thousand, three hundred ninety-one".