18220127783 has 12 divisors (see below), whose sum is σ = 21523079448. Its totient is φ = 15289616160.

The previous prime is 18220127753. The next prime is 18220127789. The reversal of 18220127783 is 38772102281.

It is not a de Polignac number, because 18220127783 - 2¹² = 18220123687 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18220127783.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18220127789) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4898660 + ... + 4902377.

It is an arithmetic number, because the mean of its divisors is an integer number (1793589954).

Almost surely, 2^18220127783 is an apocalyptic number.

18220127783 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

18220127783 is a deficient number, since it is larger than the sum of its proper divisors (3302951665).

18220127783 is a wasteful number, since it uses less digits than its factorization.

18220127783 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9801074 (or 9801061 counting only the distinct ones).

The product of its (nonzero) digits is 75264, while the sum is 41.

The spelling of 18220127783 in words is "eighteen billion, two hundred twenty million, one hundred twenty-seven thousand, seven hundred eighty-three".