20112681893 has 2 divisors, whose sum is σ = 20112681894. Its totient is φ = 20112681892.

The previous prime is 20112681871. The next prime is 20112681973. The reversal of 20112681893 is 39818621102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12697233124 + 7415448769 = 112682^2 + 86113^2 .

It is a cyclic number.

It is not a de Polignac number, because 20112681893 - 2²⁰ = 20111633317 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20112681893.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20112681803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10056340946 + 10056340947.

It is an arithmetic number, because the mean of its divisors is an integer number (10056340947).

Almost surely, 2^20112681893 is an apocalyptic number.

It is an amenable number.

20112681893 is a deficient number, since it is larger than the sum of its proper divisors (1).

20112681893 is an equidigital number, since it uses as much as digits as its factorization.

20112681893 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 41472, while the sum is 41.

The spelling of 20112681893 in words is "twenty billion, one hundred twelve million, six hundred eighty-one thousand, eight hundred ninety-three".