19502960409 has 45 divisors (see below), whose sum is σ = 29749332613. Its totient is φ = 12733001928.

The previous prime is 19502960363. The next prime is 19502960429. The reversal of 19502960409 is 90406920591.

The square root of 19502960409 is 139653.

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

19502960409 is a `hidden beast` number, since 19 + 5 + 0 + 29 + 604 + 0 + 9 = 666.

It is not a de Polignac number, because 19502960409 - 2¹⁵ = 19502927641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19502960429) by changing a digit.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 74155612 + ... + 74155874.

Almost surely, 2^19502960409 is an apocalyptic number.

19502960409 is the 139653-rd square number.

19502960409 is the 69827-th centered octagonal number.

It is an amenable number.

19502960409 is a deficient number, since it is larger than the sum of its proper divisors (10246372204).

19502960409 is an frugal number, since it uses more digits than its factorization.

19502960409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 656 (or 325 counting only the distinct ones).

The product of its (nonzero) digits is 174960, while the sum is 45.

The spelling of 19502960409 in words is "nineteen billion, five hundred two million, nine hundred sixty thousand, four hundred nine".