20692397983 has 2 divisors, whose sum is σ = 20692397984. Its totient is φ = 20692397982.

The previous prime is 20692397981. The next prime is 20692398053. The reversal of 20692397983 is 38979329602.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20692397983 - 2¹ = 20692397981 is a prime.

Together with 20692397981, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20692397981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10346198991 + 10346198992.

It is an arithmetic number, because the mean of its divisors is an integer number (10346198992).

Almost surely, 2^20692397983 is an apocalyptic number.

20692397983 is a deficient number, since it is larger than the sum of its proper divisors (1).

20692397983 is an equidigital number, since it uses as much as digits as its factorization.

20692397983 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8817984, while the sum is 58.

The spelling of 20692397983 in words is "twenty billion, six hundred ninety-two million, three hundred ninety-seven thousand, nine hundred eighty-three".