20215201620009 has 32 divisors (see below), whose sum is σ = 30614887271808. Its totient is φ = 11756869056000.

The previous prime is 20215201620007. The next prime is 20215201620011. The reversal of 20215201620009 is 90002610251202.

It is an interprime number because it is at equal distance from previous prime (20215201620007) and next prime (20215201620011).

It is not a de Polignac number, because 20215201620009 - 2¹ = 20215201620007 is a prime.

It is a super-2 number, since 2×20215201620009² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20215201620007) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 122384854 + ... + 122549919.

It is an arithmetic number, because the mean of its divisors is an integer number (956715227244).

Almost surely, 2^{20215201620009} is an apocalyptic number.

It is an amenable number.

20215201620009 is a deficient number, since it is larger than the sum of its proper divisors (10399685651799).

20215201620009 is a wasteful number, since it uses less digits than its factorization.

20215201620009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244934889.

The product of its (nonzero) digits is 4320, while the sum is 30.

The spelling of 20215201620009 in words is "twenty trillion, two hundred fifteen billion, two hundred one million, six hundred twenty thousand, nine".