20218622236 has 12 divisors (see below), whose sum is σ = 36920962512. Its totient is φ = 9669775808.

The previous prime is 20218622183. The next prime is 20218622243. The reversal of 20218622236 is 63222681202.

It is a congruent number.

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, 109883725 + ... + 109883908.

It is an arithmetic number, because the mean of its divisors is an integer number (3076746876).

Almost surely, 2^20218622236 is an apocalyptic number.

It is an amenable number.

20218622236 is a deficient number, since it is larger than the sum of its proper divisors (16702340276).

20218622236 is a wasteful number, since it uses less digits than its factorization.

20218622236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219767660 (or 219767658 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 34.

It can be divided in two parts, 202186 and 22236, that added together give a palindrome (224422).

The spelling of 20218622236 in words is "twenty billion, two hundred eighteen million, six hundred twenty-two thousand, two hundred thirty-six".