20201566874 has 4 divisors (see below), whose sum is σ = 30302350314. Its totient is φ = 10100783436.

The previous prime is 20201566843. The next prime is 20201566877. The reversal of 20201566874 is 47866510202.

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., 19327950625 + 873616249 = 139025^2 + 29557^2 .

It is not an unprimeable number, because it can be changed into a prime (20201566877) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5050391717 + ... + 5050391720.

Almost surely, 2^20201566874 is an apocalyptic number.

20201566874 is a deficient number, since it is larger than the sum of its proper divisors (10100783440).

20201566874 is a wasteful number, since it uses less digits than its factorization.

20201566874 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10100783439.

The product of its (nonzero) digits is 161280, while the sum is 41.

The spelling of 20201566874 in words is "twenty billion, two hundred one million, five hundred sixty-six thousand, eight hundred seventy-four".