20002773768 has 64 divisors (see below), whose sum is σ = 52916198400. Its totient is φ = 6287856960.

The previous prime is 20002773731. The next prime is 20002773787. The reversal of 20002773768 is 86737720002.

It is a super-2 number, since 2×20002773768² (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 (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 215998 + ... + 294381.

It is an arithmetic number, because the mean of its divisors is an integer number (826815600).

Almost surely, 2^20002773768 is an apocalyptic number.

It is an amenable number.

20002773768 is an abundant number, since it is smaller than the sum of its proper divisors (32913424632).

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

20002773768 is a wasteful number, since it uses less digits than its factorization.

20002773768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 510482 (or 510478 counting only the distinct ones).

The product of its (nonzero) digits is 197568, while the sum is 42.

The spelling of 20002773768 in words is "twenty billion, two million, seven hundred seventy-three thousand, seven hundred sixty-eight".