20211201983 has 4 divisors (see below), whose sum is σ = 23098516560. Its totient is φ = 17323887408.

The previous prime is 20211201943. The next prime is 20211202001. The reversal of 20211201983 is 38910211202.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 38910211202 = 2 ⋅19455105601.

It is a cyclic number.

It is not a de Polignac number, because 20211201983 - 2¹⁰ = 20211200959 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20211201943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1443657278 + ... + 1443657291.

It is an arithmetic number, because the mean of its divisors is an integer number (5774629140).

Almost surely, 2^20211201983 is an apocalyptic number.

20211201983 is a deficient number, since it is larger than the sum of its proper divisors (2887314577).

20211201983 is an equidigital number, since it uses as much as digits as its factorization.

20211201983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2887314576.

The product of its (nonzero) digits is 1728, while the sum is 29.

The spelling of 20211201983 in words is "twenty billion, two hundred eleven million, two hundred one thousand, nine hundred eighty-three".