20202018665 has 8 divisors (see below), whose sum is σ = 24248740608. Its totient is φ = 16157402800.

The previous prime is 20202018649. The next prime is 20202018701. The reversal of 20202018665 is 56681020202.

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

It is not a de Polignac number, because 20202018665 - 2⁴ = 20202018649 is a prime.

It is a Duffinian 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, 505337 + ... + 543846.

It is an arithmetic number, because the mean of its divisors is an integer number (3031092576).

Almost surely, 2^20202018665 is an apocalyptic number.

It is an amenable number.

20202018665 is a deficient number, since it is larger than the sum of its proper divisors (4046721943).

20202018665 is a wasteful number, since it uses less digits than its factorization.

20202018665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1053039.

The product of its (nonzero) digits is 11520, while the sum is 32.

Adding to 20202018665 its reverse (56681020202), we get a palindrome (76883038867).

The spelling of 20202018665 in words is "twenty billion, two hundred two million, eighteen thousand, six hundred sixty-five".