20188862293 has 4 divisors (see below), whose sum is σ = 20215116460. Its totient is φ = 20162608128.

The previous prime is 20188862273. The next prime is 20188862303. The reversal of 20188862293 is 39226888102.

It is a happy number.

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 4274282884 + 15914579409 = 65378^2 + 126153^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20188862293 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20188862233) 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 3 ways as a sum of consecutive naturals, for example, 13125930 + ... + 13127467.

It is an arithmetic number, because the mean of its divisors is an integer number (5053779115).

Almost surely, 2^20188862293 is an apocalyptic number.

It is an amenable number.

20188862293 is a deficient number, since it is larger than the sum of its proper divisors (26254167).

20188862293 is an equidigital number, since it uses as much as digits as its factorization.

20188862293 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26254166.

The product of its (nonzero) digits is 663552, while the sum is 49.

The spelling of 20188862293 in words is "twenty billion, one hundred eighty-eight million, eight hundred sixty-two thousand, two hundred ninety-three".