21356975411 has 8 divisors (see below), whose sum is σ = 22004451744. Its totient is φ = 20719091520.

The previous prime is 21356975377. The next prime is 21356975429. The reversal of 21356975411 is 11457965312.

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

It is a cyclic number.

It is not a de Polignac number, because 21356975411 - 2³⁰ = 20283233587 is a prime.

It is a super-2 number, since 2×21356975411² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21356975711) 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, 2393591 + ... + 2402496.

It is an arithmetic number, because the mean of its divisors is an integer number (2750556468).

Almost surely, 2^21356975411 is an apocalyptic number.

21356975411 is a deficient number, since it is larger than the sum of its proper divisors (647476333).

21356975411 is an equidigital number, since it uses as much as digits as its factorization.

21356975411 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4796221.

The product of its digits is 226800, while the sum is 44.

The spelling of 21356975411 in words is "twenty-one billion, three hundred fifty-six million, nine hundred seventy-five thousand, four hundred eleven".