20031699744 has 144 divisors (see below), whose sum is σ = 65245497408. Its totient is φ = 5710818816.

The previous prime is 20031699739. The next prime is 20031699803. The reversal of 20031699744 is 44799613002.

It is a happy number.

20031699744 is a `hidden beast` number, since 200 + 316 + 9 + 97 + 44 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a self number, because there is not a number n which added to its sum of digits gives 20031699744.

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 23 ways as a sum of consecutive naturals, for example, 930834 + ... + 952110.

It is an arithmetic number, because the mean of its divisors is an integer number (453093732).

Almost surely, 2^20031699744 is an apocalyptic number.

20031699744 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20031699744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32622748704).

20031699744 is an abundant number, since it is smaller than the sum of its proper divisors (45213797664).

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

20031699744 is a wasteful number, since it uses less digits than its factorization.

20031699744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21767 (or 21756 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 45.

The spelling of 20031699744 in words is "twenty billion, thirty-one million, six hundred ninety-nine thousand, seven hundred forty-four".