20020211983 has 4 divisors (see below), whose sum is σ = 20021764648. Its totient is φ = 20018659320.

The previous prime is 20020211971. The next prime is 20020211987. The reversal of 20020211983 is 38911202002.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20020211983 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20020211987) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 756828 + ... + 782833.

It is an arithmetic number, because the mean of its divisors is an integer number (5005441162).

Almost surely, 2^20020211983 is an apocalyptic number.

20020211983 is a deficient number, since it is larger than the sum of its proper divisors (1552665).

20020211983 is a wasteful number, since it uses less digits than its factorization.

20020211983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1552664.

The product of its (nonzero) digits is 1728, while the sum is 28.

Adding to 20020211983 its reverse (38911202002), we get a palindrome (58931413985).

The spelling of 20020211983 in words is "twenty billion, twenty million, two hundred eleven thousand, nine hundred eighty-three".