21230130309 has 8 divisors (see below), whose sum is σ = 28369886400. Its totient is φ = 14121897216.

The previous prime is 21230130277. The next prime is 21230130461. The reversal of 21230130309 is 90303103212.

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

It is not a de Polignac number, because 21230130309 - 2⁵ = 21230130277 is a prime.

It is a super-3 number, since 3×21230130309³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21230130709) 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, 7879177 + ... + 7881870.

It is an arithmetic number, because the mean of its divisors is an integer number (3546235800).

Almost surely, 2^21230130309 is an apocalyptic number.

It is an amenable number.

21230130309 is a deficient number, since it is larger than the sum of its proper divisors (7139756091).

21230130309 is a wasteful number, since it uses less digits than its factorization.

21230130309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15761499.

The product of its (nonzero) digits is 972, while the sum is 24.

The spelling of 21230130309 in words is "twenty-one billion, two hundred thirty million, one hundred thirty thousand, three hundred nine".