20010003523 has 4 divisors (see below), whose sum is σ = 20308660360. Its totient is φ = 19711346688.

The previous prime is 20010003521. The next prime is 20010003529. The reversal of 20010003523 is 32530001002.

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 20010003523 - 2¹ = 20010003521 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20010003497 and 20010003506.

It is not an unprimeable number, because it can be changed into a prime (20010003521) 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, 149328318 + ... + 149328451.

It is an arithmetic number, because the mean of its divisors is an integer number (5077165090).

Almost surely, 2^20010003523 is an apocalyptic number.

20010003523 is a deficient number, since it is larger than the sum of its proper divisors (298656837).

20010003523 is an equidigital number, since it uses as much as digits as its factorization.

20010003523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 298656836.

The product of its (nonzero) digits is 180, while the sum is 16.

Adding to 20010003523 its reverse (32530001002), we get a palindrome (52540004525).

The spelling of 20010003523 in words is "twenty billion, ten million, three thousand, five hundred twenty-three".