21042453411 has 48 divisors (see below), whose sum is σ = 35610644160. Its totient is φ = 11722199040.

The previous prime is 21042453407. The next prime is 21042453437. The reversal of 21042453411 is 11435424012.

21042453411 is a `hidden beast` number, since 2 + 1 + 0 + 4 + 245 + 3 + 411 = 666.

It is not a de Polignac number, because 21042453411 - 2² = 21042453407 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21042457411) 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 47 ways as a sum of consecutive naturals, for example, 5094195 + ... + 5098323.

It is an arithmetic number, because the mean of its divisors is an integer number (741888420).

Almost surely, 2^21042453411 is an apocalyptic number.

21042453411 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

21042453411 is a deficient number, since it is larger than the sum of its proper divisors (14568190749).

21042453411 is a wasteful number, since it uses less digits than its factorization.

21042453411 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6156 (or 6153 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

Adding to 21042453411 its reverse (11435424012), we get a palindrome (32477877423).

The spelling of 21042453411 in words is "twenty-one billion, forty-two million, four hundred fifty-three thousand, four hundred eleven".