20858006123 has 2 divisors, whose sum is σ = 20858006124. Its totient is φ = 20858006122.

The previous prime is 20858006119. The next prime is 20858006131. The reversal of 20858006123 is 32160085802.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20858006123 - 2² = 20858006119 is a prime.

It is a super-2 number, since 2×20858006123² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20858006723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10429003061 + 10429003062.

It is an arithmetic number, because the mean of its divisors is an integer number (10429003062).

Almost surely, 2^20858006123 is an apocalyptic number.

20858006123 is a deficient number, since it is larger than the sum of its proper divisors (1).

20858006123 is an equidigital number, since it uses as much as digits as its factorization.

20858006123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23040, while the sum is 35.

The spelling of 20858006123 in words is "twenty billion, eight hundred fifty-eight million, six thousand, one hundred twenty-three".