21894087403 has 4 divisors (see below), whose sum is σ = 22066481920. Its totient is φ = 21721692888.

The previous prime is 21894087401. The next prime is 21894087419. The reversal of 21894087403 is 30478049812.

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

It is a cyclic number.

It is not a de Polignac number, because 21894087403 - 2¹ = 21894087401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21894087401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86197068 + ... + 86197321.

It is an arithmetic number, because the mean of its divisors is an integer number (5516620480).

Almost surely, 2^21894087403 is an apocalyptic number.

21894087403 is a deficient number, since it is larger than the sum of its proper divisors (172394517).

21894087403 is a wasteful number, since it uses less digits than its factorization.

21894087403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172394516.

The product of its (nonzero) digits is 387072, while the sum is 46.

The spelling of 21894087403 in words is "twenty-one billion, eight hundred ninety-four million, eighty-seven thousand, four hundred three".