20012001023 has 8 divisors (see below), whose sum is σ = 23865243648. Its totient is φ = 16407354744.

The previous prime is 20012001001. The next prime is 20012001049. The reversal of 20012001023 is 32010021002.

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-20012001023 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20012000995 and 20012001013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20012001083) 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, 62148911 + ... + 62149232.

It is an arithmetic number, because the mean of its divisors is an integer number (2983155456).

Almost surely, 2^20012001023 is an apocalyptic number.

20012001023 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

20012001023 is a deficient number, since it is larger than the sum of its proper divisors (3853242625).

20012001023 is a wasteful number, since it uses less digits than its factorization.

20012001023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124298173.

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

Adding to 20012001023 its reverse (32010021002), we get a palindrome (52022022025).

The spelling of 20012001023 in words is "twenty billion, twelve million, one thousand, twenty-three".