21363378843 has 48 divisors (see below), whose sum is σ = 30143984640. Its totient is φ = 13454138880.

The previous prime is 21363378823. The next prime is 21363378863. The reversal of 21363378843 is 34887336312.

It is an interprime number because it is at equal distance from previous prime (21363378823) and next prime (21363378863).

It is not a de Polignac number, because 21363378843 - 2¹⁷ = 21363247771 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21363378792 and 21363378801.

It is not an unprimeable number, because it can be changed into a prime (21363378823) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 22091946 + ... + 22092912.

It is an arithmetic number, because the mean of its divisors is an integer number (627999680).

Almost surely, 2^21363378843 is an apocalyptic number.

21363378843 is a deficient number, since it is larger than the sum of its proper divisors (8780605797).

21363378843 is an equidigital number, since it uses as much as digits as its factorization.

21363378843 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1208 (or 1177 counting only the distinct ones).

The product of its digits is 1741824, while the sum is 48.

The spelling of 21363378843 in words is "twenty-one billion, three hundred sixty-three million, three hundred seventy-eight thousand, eight hundred forty-three".