21703338831 has 8 divisors (see below), whose sum is σ = 28938470704. Its totient is φ = 14468549760.

The previous prime is 21703338763. The next prime is 21703338851. The reversal of 21703338831 is 13883330712.

It is a happy number.

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

It is not a de Polignac number, because 21703338831 - 2¹⁵ = 21703306063 is a prime.

It is a super-2 number, since 2×21703338831² (a number of 21 digits) contains 22 as substring.

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 21703338831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21703338851) 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, 177561 + ... + 273741.

It is an arithmetic number, because the mean of its divisors is an integer number (3617308838).

Almost surely, 2^21703338831 is an apocalyptic number.

21703338831 is a deficient number, since it is larger than the sum of its proper divisors (7235131873).

21703338831 is an equidigital number, since it uses as much as digits as its factorization.

21703338831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171401.

The product of its (nonzero) digits is 72576, while the sum is 39.

The spelling of 21703338831 in words is "twenty-one billion, seven hundred three million, three hundred thirty-eight thousand, eight hundred thirty-one".