20001818182 has 4 divisors (see below), whose sum is σ = 30002727276. Its totient is φ = 10000909090.

The previous prime is 20001818173. The next prime is 20001818191. The reversal of 20001818182 is 28181810002.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (20001818173) and next prime (20001818191).

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5000454544 + ... + 5000454547.

It is an arithmetic number, because the mean of its divisors is an integer number (7500681819).

Almost surely, 2^20001818182 is an apocalyptic number.

20001818182 is a deficient number, since it is larger than the sum of its proper divisors (10000909094).

20001818182 is a wasteful number, since it uses less digits than its factorization.

20001818182 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10000909093.

The product of its (nonzero) digits is 2048, while the sum is 31.

The spelling of 20001818182 in words is "twenty billion, one million, eight hundred eighteen thousand, one hundred eighty-two".