23021350521 has 24 divisors (see below), whose sum is σ = 33412087296. Its totient is φ = 14092752960.

The previous prime is 23021350519. The next prime is 23021350523. The reversal of 23021350521 is 12505312032.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (23021350519) and next prime (23021350523).

It is not a de Polignac number, because 23021350521 - 2¹ = 23021350519 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 23021350491 and 23021350500.

It is not an unprimeable number, because it can be changed into a prime (23021350523) 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, 22030 + ... + 215703.

It is an arithmetic number, because the mean of its divisors is an integer number (1392170304).

Almost surely, 2^23021350521 is an apocalyptic number.

It is an amenable number.

23021350521 is a deficient number, since it is larger than the sum of its proper divisors (10390736775).

23021350521 is a wasteful number, since it uses less digits than its factorization.

23021350521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237953 (or 237940 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 24.

Adding to 23021350521 its reverse (12505312032), we get a palindrome (35526662553).

The spelling of 23021350521 in words is "twenty-three billion, twenty-one million, three hundred fifty thousand, five hundred twenty-one".