20100100023 has 12 divisors (see below), whose sum is σ = 30108792168. Its totient is φ = 13400066520.

The previous prime is 20100099997. The next prime is 20100100037. The reversal of 20100100023 is 32000100102.

It is a happy number.

It is not a de Polignac number, because 20100100023 - 2¹⁰ = 20100098999 is a prime.

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

It is a junction number, because it is equal to n+sod(n) for n = 20100099978 and 20100100014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20100100073) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 41357988 + ... + 41358473.

It is an arithmetic number, because the mean of its divisors is an integer number (2509066014).

Almost surely, 2^20100100023 is an apocalyptic number.

20100100023 is a deficient number, since it is larger than the sum of its proper divisors (10008692145).

20100100023 is an frugal number, since it uses more digits than its factorization.

20100100023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82716476 (or 82716464 counting only the distinct ones).

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

Adding to 20100100023 its reverse (32000100102), we get a palindrome (52100200125).

The spelling of 20100100023 in words is "twenty billion, one hundred million, one hundred thousand, twenty-three".