20460662809 has 16 divisors (see below), whose sum is σ = 20871648000. Its totient is φ = 20053085184.

The previous prime is 20460662741. The next prime is 20460662861. The reversal of 20460662809 is 90826606402.

It is a cyclic number.

It is not a de Polignac number, because 20460662809 - 2¹⁹ = 20460138521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20460662009) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16811769 + ... + 16812985.

It is an arithmetic number, because the mean of its divisors is an integer number (1304478000).

Almost surely, 2^20460662809 is an apocalyptic number.

It is an amenable number.

20460662809 is a deficient number, since it is larger than the sum of its proper divisors (410985191).

20460662809 is a wasteful number, since it uses less digits than its factorization.

20460662809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2352.

The product of its (nonzero) digits is 248832, while the sum is 43.

The spelling of 20460662809 in words is "twenty billion, four hundred sixty million, six hundred sixty-two thousand, eight hundred nine".