20440379768 has 16 divisors (see below), whose sum is σ = 39260486160. Its totient is φ = 9970916800.

The previous prime is 20440379761. The next prime is 20440379801. The reversal of 20440379768 is 86797304402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20440379761) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 31158788 + ... + 31159443.

It is an arithmetic number, because the mean of its divisors is an integer number (2453780385).

Almost surely, 2^20440379768 is an apocalyptic number.

It is an amenable number.

20440379768 is a deficient number, since it is larger than the sum of its proper divisors (18820106392).

20440379768 is a wasteful number, since it uses less digits than its factorization.

20440379768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62318278 (or 62318274 counting only the distinct ones).

The product of its (nonzero) digits is 2032128, while the sum is 50.

The spelling of 20440379768 in words is "twenty billion, four hundred forty million, three hundred seventy-nine thousand, seven hundred sixty-eight".