20499859067 has 2 divisors, whose sum is σ = 20499859068. Its totient is φ = 20499859066.

The previous prime is 20499859021. The next prime is 20499859099. The reversal of 20499859067 is 76095899402.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20499859067 - 2²⁶ = 20432750203 is a prime.

It is a super-2 number, since 2×20499859067² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20499858997 and 20499859015.

It is not a weakly prime, because it can be changed into another prime (20499849067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10249929533 + 10249929534.

It is an arithmetic number, because the mean of its divisors is an integer number (10249929534).

Almost surely, 2^20499859067 is an apocalyptic number.

20499859067 is a deficient number, since it is larger than the sum of its proper divisors (1).

20499859067 is an equidigital number, since it uses as much as digits as its factorization.

20499859067 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9797760, while the sum is 59.

The spelling of 20499859067 in words is "twenty billion, four hundred ninety-nine million, eight hundred fifty-nine thousand, sixty-seven".