18692973853 has 2 divisors, whose sum is σ = 18692973854. Its totient is φ = 18692973852.

The previous prime is 18692973847. The next prime is 18692973863. The reversal of 18692973853 is 35837929681.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17283572089 + 1409401764 = 131467^2 + 37542^2 .

It is a cyclic number.

It is not a de Polignac number, because 18692973853 - 2¹³ = 18692965661 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18692973791 and 18692973800.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18692973863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9346486926 + 9346486927.

It is an arithmetic number, because the mean of its divisors is an integer number (9346486927).

Almost surely, 2^18692973853 is an apocalyptic number.

It is an amenable number.

18692973853 is a deficient number, since it is larger than the sum of its proper divisors (1).

18692973853 is an equidigital number, since it uses as much as digits as its factorization.

18692973853 is an evil number, because the sum of its binary digits is even.

The product of its digits is 19595520, while the sum is 61.

The spelling of 18692973853 in words is "eighteen billion, six hundred ninety-two million, nine hundred seventy-three thousand, eight hundred fifty-three".