20493448263 has 6 divisors (see below), whose sum is σ = 29601647504. Its totient is φ = 13662298836.

The previous prime is 20493448259. The next prime is 20493448267. The reversal of 20493448263 is 36284439402.

20493448263 is a `hidden beast` number, since 2 + 0 + 49 + 344 + 8 + 263 = 666.

It is an interprime number because it is at equal distance from previous prime (20493448259) and next prime (20493448267).

It is not a de Polignac number, because 20493448263 - 2² = 20493448259 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20493448267) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1138524895 + ... + 1138524912.

Almost surely, 2^20493448263 is an apocalyptic number.

20493448263 is a deficient number, since it is larger than the sum of its proper divisors (9108199241).

20493448263 is a wasteful number, since it uses less digits than its factorization.

20493448263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2277049813 (or 2277049810 counting only the distinct ones).

The product of its (nonzero) digits is 995328, while the sum is 45.

The spelling of 20493448263 in words is "twenty billion, four hundred ninety-three million, four hundred forty-eight thousand, two hundred sixty-three".