21761089135 has 8 divisors (see below), whose sum is σ = 26156760336. Its totient is φ = 17379902400.

The previous prime is 21761089087. The next prime is 21761089171. The reversal of 21761089135 is 53198016712.

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

It is a de Polignac number, because none of the positive numbers 2^k-21761089135 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21761089091 and 21761089100.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3617809 + ... + 3623818.

It is an arithmetic number, because the mean of its divisors is an integer number (3269595042).

Almost surely, 2^21761089135 is an apocalyptic number.

21761089135 is a deficient number, since it is larger than the sum of its proper divisors (4395671201).

21761089135 is an equidigital number, since it uses as much as digits as its factorization.

21761089135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7242233.

The product of its (nonzero) digits is 90720, while the sum is 43.

The spelling of 21761089135 in words is "twenty-one billion, seven hundred sixty-one million, eighty-nine thousand, one hundred thirty-five".