19523977965983 has 2 divisors, whose sum is σ = 19523977965984. Its totient is φ = 19523977965982.

The previous prime is 19523977965967. The next prime is 19523977966093. The reversal of 19523977965983 is 38956977932591.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 19523977965983 - 2⁴ = 19523977965967 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19523977965913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9761988982991 + 9761988982992.

It is an arithmetic number, because the mean of its divisors is an integer number (9761988982992).

Almost surely, 2^{19523977965983} is an apocalyptic number.

19523977965983 is a deficient number, since it is larger than the sum of its proper divisors (1).

19523977965983 is an equidigital number, since it uses as much as digits as its factorization.

19523977965983 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6944162400, while the sum is 83.

The spelling of 19523977965983 in words is "nineteen trillion, five hundred twenty-three billion, nine hundred seventy-seven million, nine hundred sixty-five thousand, nine hundred eighty-three".