20230123521 has 16 divisors (see below), whose sum is σ = 27061171200. Its totient is φ = 13442948688.

The previous prime is 20230123489. The next prime is 20230123531. The reversal of 20230123521 is 12532103202.

It is not a de Polignac number, because 20230123521 - 2⁵ = 20230123489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20230123531) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4248540 + ... + 4253298.

It is an arithmetic number, because the mean of its divisors is an integer number (1691323200).

Almost surely, 2^20230123521 is an apocalyptic number.

It is an amenable number.

20230123521 is a deficient number, since it is larger than the sum of its proper divisors (6831047679).

20230123521 is a wasteful number, since it uses less digits than its factorization.

20230123521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9068.

The product of its (nonzero) digits is 720, while the sum is 21.

Adding to 20230123521 its reverse (12532103202), we get a palindrome (32762226723).

The spelling of 20230123521 in words is "twenty billion, two hundred thirty million, one hundred twenty-three thousand, five hundred twenty-one".