2000023021 has 4 divisors (see below), whose sum is σ = 2117671452. Its totient is φ = 1882374592.

The previous prime is 2000022989. The next prime is 2000023061. The reversal of 2000023021 is 1203200002.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1203200002 = 2 ⋅601600001.

It can be written as a sum of positive squares in 2 ways, for example, as 865006921 + 1135016100 = 29411^2 + 33690^2 .

It is a cyclic number.

It is not a de Polignac number, because 2000023021 - 2⁵ = 2000022989 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2000022989 and 2000023007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2000023061) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58824190 + ... + 58824223.

It is an arithmetic number, because the mean of its divisors is an integer number (529417863).

Almost surely, 2^2000023021 is an apocalyptic number.

It is an amenable number.

2000023021 is a deficient number, since it is larger than the sum of its proper divisors (117648431).

2000023021 is a wasteful number, since it uses less digits than its factorization.

2000023021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117648430.

The product of its (nonzero) digits is 24, while the sum is 10.

The square root of 2000023021 is about 44721.6169318597. The cubic root of 2000023021 is about 1259.9258839834.

Adding to 2000023021 its reverse (1203200002), we get a palindrome (3203223023).

The spelling of 2000023021 in words is "two billion, twenty-three thousand, twenty-one".