21930164903 has 8 divisors (see below), whose sum is σ = 22075662672. Its totient is φ = 21784741056.

The previous prime is 21930164899. The next prime is 21930164929. The reversal of 21930164903 is 30946103912.

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 21930164903 - 2² = 21930164899 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21930164953) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 658376 + ... + 690882.

It is an arithmetic number, because the mean of its divisors is an integer number (2759457834).

Almost surely, 2^21930164903 is an apocalyptic number.

21930164903 is a deficient number, since it is larger than the sum of its proper divisors (145497769).

21930164903 is a wasteful number, since it uses less digits than its factorization.

21930164903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36961.

The product of its (nonzero) digits is 34992, while the sum is 38.

The spelling of 21930164903 in words is "twenty-one billion, nine hundred thirty million, one hundred sixty-four thousand, nine hundred three".