20202221986 has 4 divisors (see below), whose sum is σ = 30303332982. Its totient is φ = 10101110992.

The previous prime is 20202221939. The next prime is 20202221989. The reversal of 20202221986 is 68912220202.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 13751080225 + 6451141761 = 117265^2 + 80319^2 .

It is not an unprimeable number, because it can be changed into a prime (20202221989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5050555495 + ... + 5050555498.

Almost surely, 2^20202221986 is an apocalyptic number.

20202221986 is a deficient number, since it is larger than the sum of its proper divisors (10101110996).

20202221986 is a wasteful number, since it uses less digits than its factorization.

20202221986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10101110995.

The product of its (nonzero) digits is 13824, while the sum is 34.

The spelling of 20202221986 in words is "twenty billion, two hundred two million, two hundred twenty-one thousand, nine hundred eighty-six".