21460413533 has 4 divisors (see below), whose sum is σ = 23111214588. Its totient is φ = 19809612480.

The previous prime is 21460413503. The next prime is 21460413547. The reversal of 21460413533 is 33531406412.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11194063204 + 10266350329 = 105802^2 + 101323^2 .

It is a cyclic number.

It is not a de Polignac number, because 21460413533 - 2⁸ = 21460413277 is a prime.

It is a super-3 number, since 3×21460413533³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21460413533.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21460413503) 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, 825400508 + ... + 825400533.

It is an arithmetic number, because the mean of its divisors is an integer number (5777803647).

Almost surely, 2^21460413533 is an apocalyptic number.

It is an amenable number.

21460413533 is a deficient number, since it is larger than the sum of its proper divisors (1650801055).

21460413533 is a wasteful number, since it uses less digits than its factorization.

21460413533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1650801054.

The product of its (nonzero) digits is 25920, while the sum is 32.

Adding to 21460413533 its reverse (33531406412), we get a palindrome (54991819945).

The spelling of 21460413533 in words is "twenty-one billion, four hundred sixty million, four hundred thirteen thousand, five hundred thirty-three".