21403231043 has 8 divisors (see below), whose sum is σ = 21522125520. Its totient is φ = 21284660320.

The previous prime is 21403231009. The next prime is 21403231051. The reversal of 21403231043 is 34013230412.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21403231043 - 2¹⁰ = 21403230019 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21403231063) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52253 + ... + 213393.

It is an arithmetic number, because the mean of its divisors is an integer number (2690265690).

Almost surely, 2^21403231043 is an apocalyptic number.

21403231043 is a deficient number, since it is larger than the sum of its proper divisors (118894477).

21403231043 is a wasteful number, since it uses less digits than its factorization.

21403231043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161877.

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 21403231043 its reverse (34013230412), we get a palindrome (55416461455).

The spelling of 21403231043 in words is "twenty-one billion, four hundred three million, two hundred thirty-one thousand, forty-three".