20188551206 has 16 divisors (see below), whose sum is σ = 31142134800. Its totient is φ = 9811684608.

The previous prime is 20188551191. The next prime is 20188551241. The reversal of 20188551206 is 60215588102.

It is a self number, because there is not a number n which added to its sum of digits gives 20188551206.

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, 950675 + ... + 971678.

It is an arithmetic number, because the mean of its divisors is an integer number (1946383425).

Almost surely, 2^20188551206 is an apocalyptic number.

20188551206 is a deficient number, since it is larger than the sum of its proper divisors (10953583594).

20188551206 is a wasteful number, since it uses less digits than its factorization.

20188551206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1922503.

The product of its (nonzero) digits is 38400, while the sum is 38.

The spelling of 20188551206 in words is "twenty billion, one hundred eighty-eight million, five hundred fifty-one thousand, two hundred six".