20051776616 has 64 divisors (see below), whose sum is σ = 40227494400. Its totient is φ = 9342260928.

The previous prime is 20051776609. The next prime is 20051776627. The reversal of 20051776616 is 61667715002.

It is a super-2 number, since 2×20051776616² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10009871 + ... + 10011873.

It is an arithmetic number, because the mean of its divisors is an integer number (628554600).

Almost surely, 2^20051776616 is an apocalyptic number.

It is an amenable number.

20051776616 is an abundant number, since it is smaller than the sum of its proper divisors (20175717784).

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

20051776616 is a wasteful number, since it uses less digits than its factorization.

20051776616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3078 (or 3074 counting only the distinct ones).

The product of its (nonzero) digits is 105840, while the sum is 41.

The spelling of 20051776616 in words is "twenty billion, fifty-one million, seven hundred seventy-six thousand, six hundred sixteen".