19500167449 has 9 divisors (see below), whose sum is σ = 22685005407. Its totient is φ = 16713591384.

The previous prime is 19500167447. The next prime is 19500167459. The reversal of 19500167449 is 94476100591.

The square root of 19500167449 is 139643.

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., 2070887049 + 17429280400 = 45507^2 + 132020^2 .

It is not a de Polignac number, because 19500167449 - 2¹ = 19500167447 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 19500167399 and 19500167408.

It is not an unprimeable number, because it can be changed into a prime (19500167447) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 967527 + ... + 987475.

Almost surely, 2^19500167449 is an apocalyptic number.

19500167449 is the 139643-rd square number.

19500167449 is the 69822-nd centered octagonal number.

It is an amenable number.

19500167449 is a deficient number, since it is larger than the sum of its proper divisors (3184837958).

19500167449 is an frugal number, since it uses more digits than its factorization.

19500167449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39912 (or 19956 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 46.

It can be divided in two parts, 195001 and 67449, that added together give a triangular number (262450 = T₇₂₄).

The spelling of 19500167449 in words is "nineteen billion, five hundred million, one hundred sixty-seven thousand, four hundred forty-nine".