20188999744 has 21 divisors (see below), whose sum is σ = 40064802141. Its totient is φ = 10093931520.

The previous prime is 20188999741. The next prime is 20188999751. The reversal of 20188999744 is 44799988102.

The square root of 20188999744 is 142088.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 7138222144 + 13050777600 = 84488^2 + 114240^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20188999741) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 1127824 + ... + 1145584.

It is an arithmetic number, because the mean of its divisors is an integer number (1907847721).

Almost surely, 2^20188999744 is an apocalyptic number.

20188999744 is the 142088-th square number.

It is an amenable number.

20188999744 is a deficient number, since it is larger than the sum of its proper divisors (19875802397).

20188999744 is an frugal number, since it uses more digits than its factorization.

20188999744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35534 (or 17763 counting only the distinct ones).

The product of its (nonzero) digits is 10450944, while the sum is 61.

The spelling of 20188999744 in words is "twenty billion, one hundred eighty-eight million, nine hundred ninety-nine thousand, seven hundred forty-four".