20003500123 has 2 divisors, whose sum is σ = 20003500124. Its totient is φ = 20003500122.

The previous prime is 20003500061. The next prime is 20003500129. The reversal of 20003500123 is 32100530002.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20003500123 - 2¹³ = 20003491931 is a prime.

It is a super-2 number, since 2×20003500123² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20003500097 and 20003500106.

It is not a weakly prime, because it can be changed into another prime (20003500129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10001750061 + 10001750062.

It is an arithmetic number, because the mean of its divisors is an integer number (10001750062).

Almost surely, 2^20003500123 is an apocalyptic number.

20003500123 is a deficient number, since it is larger than the sum of its proper divisors (1).

20003500123 is an equidigital number, since it uses as much as digits as its factorization.

20003500123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 180, while the sum is 16.

The spelling of 20003500123 in words is "twenty billion, three million, five hundred thousand, one hundred twenty-three".