20018234636 has 6 divisors (see below), whose sum is σ = 35031910620. Its totient is φ = 10009117316.

The previous prime is 20018234633. The next prime is 20018234701. The reversal of 20018234636 is 63643281002.

It is a junction number, because it is equal to n+sod(n) for n = 20018234596 and 20018234605.

It is not an unprimeable number, because it can be changed into a prime (20018234633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2502279326 + ... + 2502279333.

It is an arithmetic number, because the mean of its divisors is an integer number (5838651770).

Almost surely, 2^20018234636 is an apocalyptic number.

It is an amenable number.

20018234636 is a deficient number, since it is larger than the sum of its proper divisors (15013675984).

20018234636 is a wasteful number, since it uses less digits than its factorization.

20018234636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5004558663 (or 5004558661 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 35.

The spelling of 20018234636 in words is "twenty billion, eighteen million, two hundred thirty-four thousand, six hundred thirty-six".