21460401523 has 32 divisors (see below), whose sum is σ = 25169356800. Its totient is φ = 18092448000.

The previous prime is 21460401509. The next prime is 21460401553. The reversal of 21460401523 is 32510406412.

It is not a de Polignac number, because 21460401523 - 2⁵ = 21460401491 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21460401491 and 21460401500.

It is not an unprimeable number, because it can be changed into a prime (21460401553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1872990 + ... + 1884412.

It is an arithmetic number, because the mean of its divisors is an integer number (786542400).

Almost surely, 2^21460401523 is an apocalyptic number.

21460401523 is a deficient number, since it is larger than the sum of its proper divisors (3708955277).

21460401523 is a wasteful number, since it uses less digits than its factorization.

21460401523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11643.

The product of its (nonzero) digits is 5760, while the sum is 28.

Adding to 21460401523 its reverse (32510406412), we get a palindrome (53970807935).

The spelling of 21460401523 in words is "twenty-one billion, four hundred sixty million, four hundred one thousand, five hundred twenty-three".