21093405413 has 4 divisors (see below), whose sum is σ = 21093868320. Its totient is φ = 21092942508.

The previous prime is 21093405383. The next prime is 21093405433. The reversal of 21093405413 is 31450439012.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21093405413 - 2¹⁴ = 21093389029 is a prime.

It is a super-3 number, since 3×21093405413³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21093405413.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21093405433) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 154595 + ... + 257072.

It is an arithmetic number, because the mean of its divisors is an integer number (5273467080).

Almost surely, 2^21093405413 is an apocalyptic number.

It is an amenable number.

21093405413 is a deficient number, since it is larger than the sum of its proper divisors (462907).

21093405413 is an equidigital number, since it uses as much as digits as its factorization.

21093405413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 462906.

The product of its (nonzero) digits is 12960, while the sum is 32.

The spelling of 21093405413 in words is "twenty-one billion, ninety-three million, four hundred five thousand, four hundred thirteen".