20682767990 has 16 divisors (see below), whose sum is σ = 37417965552. Its totient is φ = 8231110944.

The previous prime is 20682767983. The next prime is 20682767999. The reversal of 20682767990 is 9976728602.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20682767999) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5247464 + ... + 5251403.

It is an arithmetic number, because the mean of its divisors is an integer number (2338622847).

Almost surely, 2^20682767990 is an apocalyptic number.

20682767990 is a deficient number, since it is larger than the sum of its proper divisors (16735197562).

20682767990 is a wasteful number, since it uses less digits than its factorization.

20682767990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10499071.

The product of its (nonzero) digits is 4572288, while the sum is 56.

The spelling of 20682767990 in words is "twenty billion, six hundred eighty-two million, seven hundred sixty-seven thousand, nine hundred ninety".