19538977552 has 20 divisors (see below), whose sum is σ = 37860100236. Its totient is φ = 9768629120.

The previous prime is 19538977537. The next prime is 19538977573. The reversal of 19538977552 is 25577983591.

It can be written as a sum of positive squares in 2 ways, for example, as 5874302736 + 13664674816 = 76644^2 + 116896^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 159402 + ... + 253942.

Almost surely, 2^19538977552 is an apocalyptic number.

It is an amenable number.

19538977552 is a deficient number, since it is larger than the sum of its proper divisors (18321122684).

19538977552 is a wasteful number, since it uses less digits than its factorization.

19538977552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107466 (or 107460 counting only the distinct ones).

The product of its digits is 23814000, while the sum is 61.

The spelling of 19538977552 in words is "nineteen billion, five hundred thirty-eight million, nine hundred seventy-seven thousand, five hundred fifty-two".