20052542449 has 27 divisors (see below), whose sum is σ = 22004044257. Its totient is φ = 18270701568.

The previous prime is 20052542437. The next prime is 20052542453. The reversal of 20052542449 is 94424525002.

The square root of 20052542449 is 141607.

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

It can be written as a sum of positive squares in 4 ways, for example, as 8025472225 + 12027070224 = 89585^2 + 109668^2 .

It is not a de Polignac number, because 20052542449 - 2¹¹ = 20052540401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20052542849) 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, 78025329 + ... + 78025585.

Almost surely, 2^20052542449 is an apocalyptic number.

20052542449 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

20052542449 is the 141607-th square number.

20052542449 is the 70804-th centered octagonal number.

It is an amenable number.

20052542449 is a deficient number, since it is larger than the sum of its proper divisors (1951501808).

20052542449 is an frugal number, since it uses more digits than its factorization.

20052542449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 610 (or 305 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 37.

The spelling of 20052542449 in words is "twenty billion, fifty-two million, five hundred forty-two thousand, four hundred forty-nine".