20370009 has 8 divisors (see below), whose sum is σ = 29629152. Its totient is φ = 12345440.

The previous prime is 20369981. The next prime is 20370011. The reversal of 20370009 is 90007302.

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 20370009 - 2¹⁷ = 20238937 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20370059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 308604 + ... + 308669.

It is an arithmetic number, because the mean of its divisors is an integer number (3703644).

Almost surely, 2^20370009 is an apocalyptic number.

It is an amenable number.

20370009 is a deficient number, since it is larger than the sum of its proper divisors (9259143).

20370009 is a wasteful number, since it uses less digits than its factorization.

20370009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 617287.

The product of its (nonzero) digits is 378, while the sum is 21.

The square root of 20370009 is about 4513.3146356087. The cubic root of 20370009 is about 273.1054752174.

The spelling of 20370009 in words is "twenty million, three hundred seventy thousand, nine".