19886922441 has 27 divisors (see below), whose sum is σ = 29846011143. Its totient is φ = 13250333160.

The previous prime is 19886922431. The next prime is 19886922481. The reversal of 19886922441 is 14422968891.

It is a happy number.

The square root of 19886922441 is 141021.

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

19886922441 is a `hidden beast` number, since 198 + 8 + 6 + 9 + 2 + 2 + 441 = 666.

It can be written as a sum of positive squares in only one way, i.e., 22838841 + 19864083600 = 4779^2 + 140940^2 .

It is a tau number, because it is divible by the number of its divisors (27).

It is not a de Polignac number, because 19886922441 - 2⁵ = 19886922409 is a prime.

It is not an unprimeable number, because it can be changed into a prime (19886922421) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 11421831 + ... + 11423571.

Almost surely, 2^19886922441 is an apocalyptic number.

19886922441 is the 141021-st square number.

19886922441 is the 70511-st centered octagonal number.

It is an amenable number.

19886922441 is a deficient number, since it is larger than the sum of its proper divisors (9959088702).

19886922441 is an frugal number, since it uses more digits than its factorization.

19886922441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3506 (or 1744 counting only the distinct ones).

The product of its digits is 1990656, while the sum is 54.

The spelling of 19886922441 in words is "nineteen billion, eight hundred eighty-six million, nine hundred twenty-two thousand, four hundred forty-one".