20000010123 has 12 divisors (see below), whose sum is σ = 29109431208. Its totient is φ = 13231558080.

The previous prime is 20000010119. The next prime is 20000010133. The reversal of 20000010123 is 32101000002.

It is a happy number.

It is not a de Polignac number, because 20000010123 - 2² = 20000010119 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (20000010103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8480590 + ... + 8482947.

It is an arithmetic number, because the mean of its divisors is an integer number (2425785934).

Almost surely, 2^20000010123 is an apocalyptic number.

20000010123 is a deficient number, since it is larger than the sum of its proper divisors (9109421085).

20000010123 is a wasteful number, since it uses less digits than its factorization.

20000010123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16963674 (or 16963671 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

Adding to 20000010123 its reverse (32101000002), we get a palindrome (52101010125).

The spelling of 20000010123 in words is "twenty billion, ten thousand, one hundred twenty-three".