20283499393 has 4 divisors (see below), whose sum is σ = 20287544148. Its totient is φ = 20279454640.

The previous prime is 20283499387. The next prime is 20283499409. The reversal of 20283499393 is 39399438202.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 12701966209 + 7581533184 = 112703^2 + 87072^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20283499393 is a prime.

It is a super-2 number, since 2×20283499393² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20283499393.

It is not an unprimeable number, because it can be changed into a prime (20283499303) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2014846 + ... + 2024887.

It is an arithmetic number, because the mean of its divisors is an integer number (5071886037).

Almost surely, 2^20283499393 is an apocalyptic number.

It is an amenable number.

20283499393 is a deficient number, since it is larger than the sum of its proper divisors (4044755).

20283499393 is an equidigital number, since it uses as much as digits as its factorization.

20283499393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4044754.

The product of its (nonzero) digits is 2519424, while the sum is 52.

The spelling of 20283499393 in words is "twenty billion, two hundred eighty-three million, four hundred ninety-nine thousand, three hundred ninety-three".