20196773009 has 12 divisors (see below), whose sum is σ = 23498956800. Its totient is φ = 17308018728.

The previous prime is 20196772943. The next prime is 20196773011. The reversal of 20196773009 is 90037769102.

It is a happy number.

It is not a de Polignac number, because 20196773009 - 2³² = 15901805713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20196773039) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 219632 + ... + 297710.

It is an arithmetic number, because the mean of its divisors is an integer number (1958246400).

Almost surely, 2^20196773009 is an apocalyptic number.

It is an amenable number.

20196773009 is a deficient number, since it is larger than the sum of its proper divisors (3302183791).

20196773009 is an equidigital number, since it uses as much as digits as its factorization.

20196773009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83372 (or 83365 counting only the distinct ones).

The product of its (nonzero) digits is 142884, while the sum is 44.

The spelling of 20196773009 in words is "twenty billion, one hundred ninety-six million, seven hundred seventy-three thousand, nine".