21143086403 has 4 divisors (see below), whose sum is σ = 21167086248. Its totient is φ = 21119086560.

The previous prime is 21143086397. The next prime is 21143086477. The reversal of 21143086403 is 30468034112.

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 21143086403 - 2⁴ = 21143086387 is a prime.

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 21143086403.

It is not an unprimeable number, because it can be changed into a prime (21143086903) 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, 11998601 + ... + 12000362.

It is an arithmetic number, because the mean of its divisors is an integer number (5291771562).

Almost surely, 2^21143086403 is an apocalyptic number.

21143086403 is a deficient number, since it is larger than the sum of its proper divisors (23999845).

21143086403 is an equidigital number, since it uses as much as digits as its factorization.

21143086403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23999844.

The product of its (nonzero) digits is 13824, while the sum is 32.

The spelling of 21143086403 in words is "twenty-one billion, one hundred forty-three million, eighty-six thousand, four hundred three".