18382728202 has 4 divisors (see below), whose sum is σ = 27574092306. Its totient is φ = 9191364100.

The previous prime is 18382728197. The next prime is 18382728227. The reversal of 18382728202 is 20282728381.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 20282728381 = 7603 ⋅2667727.

It can be written as a sum of positive squares in only one way, i.e., 18381665241 + 1062961 = 135579^2 + 1031^2 .

It is a super-2 number, since 2×18382728202² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4595682049 + ... + 4595682052.

Almost surely, 2^18382728202 is an apocalyptic number.

18382728202 is a deficient number, since it is larger than the sum of its proper divisors (9191364104).

18382728202 is an equidigital number, since it uses as much as digits as its factorization.

18382728202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9191364103.

The product of its (nonzero) digits is 172032, while the sum is 43.

The spelling of 18382728202 in words is "eighteen billion, three hundred eighty-two million, seven hundred twenty-eight thousand, two hundred two".