21312269803 has 32 divisors (see below), whose sum is σ = 24005652480. Its totient is φ = 18755237760.

The previous prime is 21312269801. The next prime is 21312269813. The reversal of 21312269803 is 30896221312.

It is a cyclic number.

It is not a de Polignac number, because 21312269803 - 2¹ = 21312269801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21312269801) 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 31 ways as a sum of consecutive naturals, for example, 21375901 + ... + 21376897.

It is an arithmetic number, because the mean of its divisors is an integer number (750176640).

Almost surely, 2^21312269803 is an apocalyptic number.

21312269803 is a deficient number, since it is larger than the sum of its proper divisors (2693382677).

21312269803 is a wasteful number, since it uses less digits than its factorization.

21312269803 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1467.

The product of its (nonzero) digits is 31104, while the sum is 37.

The spelling of 21312269803 in words is "twenty-one billion, three hundred twelve million, two hundred sixty-nine thousand, eight hundred three".