21403463206 has 32 divisors (see below), whose sum is σ = 33176983680. Its totient is φ = 10351411200.

The previous prime is 21403463203. The next prime is 21403463219. The reversal of 21403463206 is 60236430412.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21403463203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2472646 + ... + 2481286.

It is an arithmetic number, because the mean of its divisors is an integer number (1036780740).

Almost surely, 2^21403463206 is an apocalyptic number.

21403463206 is a deficient number, since it is larger than the sum of its proper divisors (11773520474).

21403463206 is a wasteful number, since it uses less digits than its factorization.

21403463206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9040.

The product of its (nonzero) digits is 20736, while the sum is 31.

Adding to 21403463206 its reverse (60236430412), we get a palindrome (81639893618).

The spelling of 21403463206 in words is "twenty-one billion, four hundred three million, four hundred sixty-three thousand, two hundred six".