21010412523 has 16 divisors (see below), whose sum is σ = 29664835200. Its totient is φ = 13181636736.

The previous prime is 21010412497. The next prime is 21010412543. The reversal of 21010412523 is 32521401012.

It is not a de Polignac number, because 21010412523 - 2⁶ = 21010412459 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21010412523.

It is not an unprimeable number, because it can be changed into a prime (21010412543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 735636 + ... + 763662.

It is an arithmetic number, because the mean of its divisors is an integer number (1854052200).

Almost surely, 2^21010412523 is an apocalyptic number.

21010412523 is a deficient number, since it is larger than the sum of its proper divisors (8654422677).

21010412523 is a wasteful number, since it uses less digits than its factorization.

21010412523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42746.

The product of its (nonzero) digits is 480, while the sum is 21.

Adding to 21010412523 its reverse (32521401012), we get a palindrome (53531813535).

The spelling of 21010412523 in words is "twenty-one billion, ten million, four hundred twelve thousand, five hundred twenty-three".