20123001 has 12 divisors (see below), whose sum is σ = 29231280. Its totient is φ = 13339320.

The previous prime is 20122997. The next prime is 20123017. The reversal of 20123001 is 10032102.

It is a happy number.

It is not a de Polignac number, because 20123001 - 2² = 20122997 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 (20123021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4635 + ... + 7856.

It is an arithmetic number, because the mean of its divisors is an integer number (2435940).

Almost surely, 2^20123001 is an apocalyptic number.

It is an amenable number.

20123001 is a deficient number, since it is larger than the sum of its proper divisors (9108279).

20123001 is a wasteful number, since it uses less digits than its factorization.

20123001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12676 (or 12673 counting only the distinct ones).

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

The square root of 20123001 is about 4485.8668058693. The cubic root of 20123001 is about 271.9970849241.

Adding to 20123001 its reverse (10032102), we get a palindrome (30155103).

The spelling of 20123001 in words is "twenty million, one hundred twenty-three thousand, one".