20409306616 has 32 divisors (see below), whose sum is σ = 40810014000. Its totient is φ = 9535274496.

The previous prime is 20409306613. The next prime is 20409306637. The reversal of 20409306616 is 61660390402.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20409306613) 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, 520911 + ... + 558718.

Almost surely, 2^20409306616 is an apocalyptic number.

It is an amenable number.

20409306616 is a deficient number, since it is larger than the sum of its proper divisors (20400707384).

20409306616 is a wasteful number, since it uses less digits than its factorization.

20409306616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1079791 (or 1079787 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 37.

The spelling of 20409306616 in words is "twenty billion, four hundred nine million, three hundred six thousand, six hundred sixteen".