10002001023 has 24 divisors (see below), whose sum is σ = 17080596000. Its totient is φ = 5518344384.

The previous prime is 10002001003. The next prime is 10002001027. The reversal of 10002001023 is 32010020001.

It is a happy number.

It is not a de Polignac number, because 10002001023 - 2⁵ = 10002000991 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 = 10002000996 and 10002001014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10002001027) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2735448 + ... + 2739101.

It is an arithmetic number, because the mean of its divisors is an integer number (711691500).

Almost surely, 2^10002001023 is an apocalyptic number.

10002001023 is a deficient number, since it is larger than the sum of its proper divisors (7078594977).

10002001023 is a wasteful number, since it uses less digits than its factorization.

10002001023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5474591 (or 5474588 counting only the distinct ones).

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

Adding to 10002001023 its reverse (32010020001), we get a palindrome (42012021024).

The spelling of 10002001023 in words is "ten billion, two million, one thousand, twenty-three".