20400336606 has 16 divisors (see below), whose sum is σ = 43939186704. Its totient is φ = 6277026624.

The previous prime is 20400336601. The next prime is 20400336629. The reversal of 20400336606 is 60663300402.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20400336601) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 130771311 + ... + 130771466.

It is an arithmetic number, because the mean of its divisors is an integer number (2746199169).

Almost surely, 2^20400336606 is an apocalyptic number.

20400336606 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

20400336606 is an abundant number, since it is smaller than the sum of its proper divisors (23538850098).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20400336606 is a wasteful number, since it uses less digits than its factorization.

20400336606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261542795.

The product of its (nonzero) digits is 15552, while the sum is 30.

The spelling of 20400336606 in words is "twenty billion, four hundred million, three hundred thirty-six thousand, six hundred six".