21041073461 has 4 divisors (see below), whose sum is σ = 22148498400. Its totient is φ = 19933648524.

The previous prime is 21041073373. The next prime is 21041073467. The reversal of 21041073461 is 16437014012.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 21041073461 - 2¹⁸ = 21040811317 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21041073467) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 553712441 + ... + 553712478.

It is an arithmetic number, because the mean of its divisors is an integer number (5537124600).

Almost surely, 2^21041073461 is an apocalyptic number.

It is an amenable number.

21041073461 is a deficient number, since it is larger than the sum of its proper divisors (1107424939).

21041073461 is a wasteful number, since it uses less digits than its factorization.

21041073461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1107424938.

The product of its (nonzero) digits is 4032, while the sum is 29.

Adding to 21041073461 its reverse (16437014012), we get a palindrome (37478087473).

The spelling of 21041073461 in words is "twenty-one billion, forty-one million, seventy-three thousand, four hundred sixty-one".