21461036055 has 8 divisors (see below), whose sum is σ = 34337657712. Its totient is φ = 11445885888.

The previous prime is 21461036041. The next prime is 21461036059. The reversal of 21461036055 is 55063016412.

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

It is not a de Polignac number, because 21461036055 - 2⁷ = 21461035927 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21461036059) 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, 715367854 + ... + 715367883.

It is an arithmetic number, because the mean of its divisors is an integer number (4292207214).

Almost surely, 2^21461036055 is an apocalyptic number.

21461036055 is a deficient number, since it is larger than the sum of its proper divisors (12876621657).

21461036055 is a wasteful number, since it uses less digits than its factorization.

21461036055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1430735745.

The product of its (nonzero) digits is 21600, while the sum is 33.

The spelling of 21461036055 in words is "twenty-one billion, four hundred sixty-one million, thirty-six thousand, fifty-five".