2109473021 has 8 divisors (see below), whose sum is σ = 2182800000. Its totient is φ = 2036185200.

The previous prime is 2109473017. The next prime is 2109473029. The reversal of 2109473021 is 1203749012.

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 2109473021 - 2² = 2109473017 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2109473029) 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, 137696 + ... + 152246.

It is an arithmetic number, because the mean of its divisors is an integer number (272850000).

Almost surely, 2^2109473021 is an apocalyptic number.

It is an amenable number.

2109473021 is a deficient number, since it is larger than the sum of its proper divisors (73326979).

2109473021 is a wasteful number, since it uses less digits than its factorization.

2109473021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19579.

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 2109473021 is about 45928.9997822726. Note that the first 3 decimals coincide. The cubic root of 2109473021 is about 1282.5018250097.

The spelling of 2109473021 in words is "two billion, one hundred nine million, four hundred seventy-three thousand, twenty-one".