21046102804653 has 8 divisors (see below), whose sum is σ = 28714062741408. Its totient is φ = 13704439035504.

The previous prime is 21046102804633. The next prime is 21046102804691. The reversal of 21046102804653 is 35640820164012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21046102804653 - 2²² = 21046098610349 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21046102804613) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81574041750 + ... + 81574042007.

It is an arithmetic number, because the mean of its divisors is an integer number (3589257842676).

Almost surely, 2^{21046102804653} is an apocalyptic number.

It is an amenable number.

21046102804653 is a deficient number, since it is larger than the sum of its proper divisors (7667959936755).

21046102804653 is a wasteful number, since it uses less digits than its factorization.

21046102804653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163148083803.

The product of its (nonzero) digits is 276480, while the sum is 42.

Adding to 21046102804653 its reverse (35640820164012), we get a palindrome (56686922968665).

The spelling of 21046102804653 in words is "twenty-one trillion, forty-six billion, one hundred two million, eight hundred four thousand, six hundred fifty-three".