21245452411 has 4 divisors (see below), whose sum is σ = 21245746824. Its totient is φ = 21245158000.

The previous prime is 21245452409. The next prime is 21245452457. The reversal of 21245452411 is 11425454212.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 21245452411 - 2¹ = 21245452409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21245455411) 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, 42711 + ... + 210511.

It is an arithmetic number, because the mean of its divisors is an integer number (5311436706).

Almost surely, 2^21245452411 is an apocalyptic number.

21245452411 is a deficient number, since it is larger than the sum of its proper divisors (294413).

21245452411 is a wasteful number, since it uses less digits than its factorization.

21245452411 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 294412.

The product of its digits is 12800, while the sum is 31.

The spelling of 21245452411 in words is "twenty-one billion, two hundred forty-five million, four hundred fifty-two thousand, four hundred eleven".