20616225616 has 40 divisors (see below), whose sum is σ = 47122809344. Its totient is φ = 8550506880.

The previous prime is 20616225589. The next prime is 20616225659. The reversal of 20616225616 is 61652261602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2965455 + ... + 2972398.

Almost surely, 2^20616225616 is an apocalyptic number.

It is an amenable number.

20616225616 is an abundant number, since it is smaller than the sum of its proper divisors (26506583728).

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

20616225616 is a wasteful number, since it uses less digits than its factorization.

20616225616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5937899 (or 5937893 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 37.

The spelling of 20616225616 in words is "twenty billion, six hundred sixteen million, two hundred twenty-five thousand, six hundred sixteen".