20021769889 has 8 divisors (see below), whose sum is σ = 22149564480. Its totient is φ = 17945247600.

The previous prime is 20021769881. The next prime is 20021769991. The reversal of 20021769889 is 98896712002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20021769889 - 2³ = 20021769881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20021769881) 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, 12817254 + ... + 12818815.

It is an arithmetic number, because the mean of its divisors is an integer number (2768695560).

Almost surely, 2^20021769889 is an apocalyptic number.

It is an amenable number.

20021769889 is a deficient number, since it is larger than the sum of its proper divisors (2127794591).

20021769889 is a wasteful number, since it uses less digits than its factorization.

20021769889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25636151.

The product of its (nonzero) digits is 870912, while the sum is 52.

The spelling of 20021769889 in words is "twenty billion, twenty-one million, seven hundred sixty-nine thousand, eight hundred eighty-nine".