20409836206 has 32 divisors (see below), whose sum is σ = 31103130240. Its totient is φ = 10043805600.

The previous prime is 20409836173. The next prime is 20409836221. The reversal of 20409836206 is 60263890402.

It is a super-2 number, since 2×20409836206² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29536321 + ... + 29537011.

It is an arithmetic number, because the mean of its divisors is an integer number (971972820).

Almost surely, 2^20409836206 is an apocalyptic number.

20409836206 is a deficient number, since it is larger than the sum of its proper divisors (10693294034).

20409836206 is a wasteful number, since it uses less digits than its factorization.

20409836206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1600.

The product of its (nonzero) digits is 124416, while the sum is 40.

The spelling of 20409836206 in words is "twenty billion, four hundred nine million, eight hundred thirty-six thousand, two hundred six".