202130400023 has 4 divisors (see below), whose sum is σ = 206431046880. Its totient is φ = 197829753168.

The previous prime is 202130399987. The next prime is 202130400047. The reversal of 202130400023 is 320004031202.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 202130400023 - 2¹⁶ = 202130334487 is a prime.

It is a super-2 number, since 2×202130400023² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 202130399974 and 202130400010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202130400083) 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, 2150323358 + ... + 2150323451.

It is an arithmetic number, because the mean of its divisors is an integer number (51607761720).

Almost surely, 2^202130400023 is an apocalyptic number.

202130400023 is a deficient number, since it is larger than the sum of its proper divisors (4300646857).

202130400023 is an equidigital number, since it uses as much as digits as its factorization.

202130400023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4300646856.

The product of its (nonzero) digits is 288, while the sum is 17.

Adding to 202130400023 its reverse (320004031202), we get a palindrome (522134431225).

The spelling of 202130400023 in words is "two hundred two billion, one hundred thirty million, four hundred thousand, twenty-three".