20751440842336 has 24 divisors (see below), whose sum is σ = 40855086712440. Its totient is φ = 10375545804288.

The previous prime is 20751440842271. The next prime is 20751440842339. The reversal of 20751440842336 is 63324804415702.

It is a self number, because there is not a number n which added to its sum of digits gives 20751440842336.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20751440842339) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3515001 + ... + 7338808.

It is an arithmetic number, because the mean of its divisors is an integer number (1702295279685).

Almost surely, 2^{20751440842336} is an apocalyptic number.

It is an amenable number.

20751440842336 is a deficient number, since it is larger than the sum of its proper divisors (20103645870104).

20751440842336 is a wasteful number, since it uses less digits than its factorization.

20751440842336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10913566 (or 10913558 counting only the distinct ones).

The product of its (nonzero) digits is 3870720, while the sum is 49.

The spelling of 20751440842336 in words is "twenty trillion, seven hundred fifty-one billion, four hundred forty million, eight hundred forty-two thousand, three hundred thirty-six".