21401346556363 has 4 divisors (see below), whose sum is σ = 21401434342288. Its totient is φ = 21401258770440.

The previous prime is 21401346556339. The next prime is 21401346556433. The reversal of 21401346556363 is 36365564310412.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21401346556363 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21401346556333) 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, 43526256 + ... + 44015197.

It is an arithmetic number, because the mean of its divisors is an integer number (5350358585572).

Almost surely, 2^{21401346556363} is an apocalyptic number.

21401346556363 is a deficient number, since it is larger than the sum of its proper divisors (87785925).

21401346556363 is an equidigital number, since it uses as much as digits as its factorization.

21401346556363 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87785924.

The product of its (nonzero) digits is 4665600, while the sum is 49.

The spelling of 21401346556363 in words is "twenty-one trillion, four hundred one billion, three hundred forty-six million, five hundred fifty-six thousand, three hundred sixty-three".