20120001023 has 8 divisors (see below), whose sum is σ = 20143256640. Its totient is φ = 20096762400.

The previous prime is 20120001001. The next prime is 20120001049. The reversal of 20120001023 is 32010002102.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20120001023 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20120000995 and 20120001013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20120001073) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5903786 + ... + 5907192.

It is an arithmetic number, because the mean of its divisors is an integer number (2517907080).

Almost surely, 2^20120001023 is an apocalyptic number.

20120001023 is a deficient number, since it is larger than the sum of its proper divisors (23255617).

20120001023 is a wasteful number, since it uses less digits than its factorization.

20120001023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8497.

The product of its (nonzero) digits is 24, while the sum is 11.

Adding to 20120001023 its reverse (32010002102), we get a palindrome (52130003125).

The spelling of 20120001023 in words is "twenty billion, one hundred twenty million, one thousand, twenty-three".