21730945101 has 8 divisors (see below), whose sum is σ = 28980983904. Its totient is φ = 14484101520.

The previous prime is 21730945097. The next prime is 21730945111. The reversal of 21730945101 is 10154903712.

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

It is not a de Polignac number, because 21730945101 - 2² = 21730945097 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21730945111) 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, 782890 + ... + 810171.

It is an arithmetic number, because the mean of its divisors is an integer number (3622622988).

Almost surely, 2^21730945101 is an apocalyptic number.

It is an amenable number.

21730945101 is a deficient number, since it is larger than the sum of its proper divisors (7250038803).

21730945101 is a wasteful number, since it uses less digits than its factorization.

21730945101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1597611.

The product of its (nonzero) digits is 7560, while the sum is 33.

The spelling of 21730945101 in words is "twenty-one billion, seven hundred thirty million, nine hundred forty-five thousand, one hundred one".