20867099893 has 2 divisors, whose sum is σ = 20867099894. Its totient is φ = 20867099892.

The previous prime is 20867099863. The next prime is 20867099927. The reversal of 20867099893 is 39899076802.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19898769969 + 968329924 = 141063^2 + 31118^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20867099893 is a prime.

It is a super-2 number, since 2×20867099893² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20867099863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10433549946 + 10433549947.

It is an arithmetic number, because the mean of its divisors is an integer number (10433549947).

Almost surely, 2^20867099893 is an apocalyptic number.

It is an amenable number.

20867099893 is a deficient number, since it is larger than the sum of its proper divisors (1).

20867099893 is an equidigital number, since it uses as much as digits as its factorization.

20867099893 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11757312, while the sum is 61.

The spelling of 20867099893 in words is "twenty billion, eight hundred sixty-seven million, ninety-nine thousand, eight hundred ninety-three".