21036553469 has 8 divisors (see below), whose sum is σ = 21795886080. Its totient is φ = 20282266800.

The previous prime is 21036553367. The next prime is 21036553481. The reversal of 21036553469 is 96435563012.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21036553469 is a prime.

It is a super-3 number, since 3×21036553469³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21036553669) 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 7 ways as a sum of consecutive naturals, for example, 1252997 + ... + 1269674.

It is an arithmetic number, because the mean of its divisors is an integer number (2724485760).

Almost surely, 2^21036553469 is an apocalyptic number.

It is an amenable number.

21036553469 is a deficient number, since it is larger than the sum of its proper divisors (759332611).

21036553469 is a wasteful number, since it uses less digits than its factorization.

21036553469 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2522971.

The product of its (nonzero) digits is 583200, while the sum is 44.

The spelling of 21036553469 in words is "twenty-one billion, thirty-six million, five hundred fifty-three thousand, four hundred sixty-nine".