20768377340 has 12 divisors (see below), whose sum is σ = 43613592456. Its totient is φ = 8307350928.

The previous prime is 20768377337. The next prime is 20768377361. The reversal of 20768377340 is 4377386702.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 519209414 + ... + 519209453.

It is an arithmetic number, because the mean of its divisors is an integer number (3634466038).

Almost surely, 2^20768377340 is an apocalyptic number.

20768377340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20768377340 is an abundant number, since it is smaller than the sum of its proper divisors (22845215116).

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

20768377340 is a wasteful number, since it uses less digits than its factorization.

20768377340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1038418876 (or 1038418874 counting only the distinct ones).

The product of its (nonzero) digits is 1185408, while the sum is 47.

The spelling of 20768377340 in words is "twenty billion, seven hundred sixty-eight million, three hundred seventy-seven thousand, three hundred forty".