19952149648 has 20 divisors (see below), whose sum is σ = 38999393388. Its totient is φ = 9887790080.

The previous prime is 19952149627. The next prime is 19952149649. The reversal of 19952149648 is 84694125991.

It can be written as a sum of positive squares in 2 ways, for example, as 455054224 + 19497095424 = 21332^2 + 139632^2 .

It is a junction number, because it is equal to n+sod(n) for n = 19952149592 and 19952149601.

It is not an unprimeable number, because it can be changed into a prime (19952149649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5515933 + ... + 5519548.

Almost surely, 2^19952149648 is an apocalyptic number.

It is an amenable number.

19952149648 is a deficient number, since it is larger than the sum of its proper divisors (19047243740).

19952149648 is a wasteful number, since it uses less digits than its factorization.

19952149648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11035602 (or 11035596 counting only the distinct ones).

The product of its digits is 5598720, while the sum is 58.

The spelling of 19952149648 in words is "nineteen billion, nine hundred fifty-two million, one hundred forty-nine thousand, six hundred forty-eight".