202100023 has 4 divisors (see below), whose sum is σ = 203554120. Its totient is φ = 200645928.

The previous prime is 202099993. The next prime is 202100033. The reversal of 202100023 is 320001202.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 320001202 = 2 ⋅160000601.

It is a cyclic number.

It is not a de Polignac number, because 202100023 - 2¹³ = 202091831 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 202099982 and 202100009.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202100033) 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, 726840 + ... + 727117.

It is an arithmetic number, because the mean of its divisors is an integer number (50888530).

Almost surely, 2^202100023 is an apocalyptic number.

202100023 is a deficient number, since it is larger than the sum of its proper divisors (1454097).

202100023 is a wasteful number, since it uses less digits than its factorization.

202100023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1454096.

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

The square root of 202100023 is about 14216.1887649257. The cubic root of 202100023 is about 586.8432599766.

Adding to 202100023 its reverse (320001202), we get a palindrome (522101225).

The spelling of 202100023 in words is "two hundred two million, one hundred thousand, twenty-three".