20463228188 has 24 divisors (see below), whose sum is σ = 38788252608. Its totient is φ = 9389969856.

The previous prime is 20463228169. The next prime is 20463228193. The reversal of 20463228188 is 88182236402.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1128356 + ... + 1146347.

It is an arithmetic number, because the mean of its divisors is an integer number (1616177192).

Almost surely, 2^20463228188 is an apocalyptic number.

It is an amenable number.

20463228188 is a deficient number, since it is larger than the sum of its proper divisors (18325024420).

20463228188 is a wasteful number, since it uses less digits than its factorization.

20463228188 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2274893 (or 2274891 counting only the distinct ones).

The product of its (nonzero) digits is 294912, while the sum is 44.

The spelling of 20463228188 in words is "twenty billion, four hundred sixty-three million, two hundred twenty-eight thousand, one hundred eighty-eight".