21045452411 has 4 divisors (see below), whose sum is σ = 21057855672. Its totient is φ = 21033049152.

The previous prime is 21045452399. The next prime is 21045452459. The reversal of 21045452411 is 11425454012.

It is a happy number.

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 21045452411 - 2⁶ = 21045452347 is a prime.

It is a super-2 number, since 2×21045452411² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21045452471) 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 3 ways as a sum of consecutive naturals, for example, 6199085 + ... + 6202478.

It is an arithmetic number, because the mean of its divisors is an integer number (5264463918).

Almost surely, 2^21045452411 is an apocalyptic number.

21045452411 is a deficient number, since it is larger than the sum of its proper divisors (12403261).

21045452411 is a wasteful number, since it uses less digits than its factorization.

21045452411 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12403260.

The product of its (nonzero) digits is 6400, while the sum is 29.

The spelling of 21045452411 in words is "twenty-one billion, forty-five million, four hundred fifty-two thousand, four hundred eleven".