16820231983 has 2 divisors, whose sum is σ = 16820231984. Its totient is φ = 16820231982.

The previous prime is 16820231899. The next prime is 16820232031. The reversal of 16820231983 is 38913202861.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 16820231983 - 2²¹ = 16818134831 is a prime.

It is a super-3 number, since 3×16820231983³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16820237983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8410115991 + 8410115992.

It is an arithmetic number, because the mean of its divisors is an integer number (8410115992).

Almost surely, 2^16820231983 is an apocalyptic number.

16820231983 is a deficient number, since it is larger than the sum of its proper divisors (1).

16820231983 is an equidigital number, since it uses as much as digits as its factorization.

16820231983 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 124416, while the sum is 43.

The spelling of 16820231983 in words is "sixteen billion, eight hundred twenty million, two hundred thirty-one thousand, nine hundred eighty-three".