20470844554909 has 32 divisors (see below), whose sum is σ = 25433140838400. Its totient is φ = 16086460705920.

The previous prime is 20470844554891. The next prime is 20470844554967. The reversal of 20470844554909 is 90945544807402.

It is a cyclic number.

It is not a de Polignac number, because 20470844554909 - 2⁴³ = 11674751532701 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20470844554999) 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, 17841477 + ... + 18954154.

It is an arithmetic number, because the mean of its divisors is an integer number (794785651200).

Almost surely, 2^{20470844554909} is an apocalyptic number.

It is an amenable number.

20470844554909 is a deficient number, since it is larger than the sum of its proper divisors (4962296283491).

20470844554909 is a wasteful number, since it uses less digits than its factorization.

20470844554909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36795793.

The product of its (nonzero) digits is 58060800, while the sum is 61.

The spelling of 20470844554909 in words is "twenty trillion, four hundred seventy billion, eight hundred forty-four million, five hundred fifty-four thousand, nine hundred nine".