18202020202 has 8 divisors (see below), whose sum is σ = 28183773312. Its totient is φ = 8807429100.

The previous prime is 18202020191. The next prime is 18202020217. The reversal of 18202020202 is 20202020281.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×18202020202² (a number of 21 digits) contains 22 as substring.

18202020202 is a modest number, since divided by 20202 gives 18202 as remainder.

It is a self number, because there is not a number n which added to its sum of digits gives 18202020202.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 146790424 + ... + 146790547.

It is an arithmetic number, because the mean of its divisors is an integer number (3522971664).

Almost surely, 2^18202020202 is an apocalyptic number.

18202020202 is a deficient number, since it is larger than the sum of its proper divisors (9981753110).

18202020202 is a wasteful number, since it uses less digits than its factorization.

18202020202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 293581004.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 18202020202 its reverse (20202020281), we get a palindrome (38404040483).

The spelling of 18202020202 in words is "eighteen billion, two hundred two million, twenty thousand, two hundred two".