19489473 has 12 divisors (see below), whose sum is σ = 28838628. Its totient is φ = 12675840.

The previous prime is 19489471. The next prime is 19489489. The reversal of 19489473 is 37498491.

It can be written as a sum of positive squares in 2 ways, for example, as 278784 + 19210689 = 528^2 + 4383^2 .

It is not a de Polignac number, because 19489473 - 2¹ = 19489471 is a prime.

It is not an unprimeable number, because it can be changed into a prime (19489471) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 26040 + ... + 26777.

It is an arithmetic number, because the mean of its divisors is an integer number (2403219).

Almost surely, 2^19489473 is an apocalyptic number.

It is an amenable number.

19489473 is a deficient number, since it is larger than the sum of its proper divisors (9349155).

19489473 is a wasteful number, since it uses less digits than its factorization.

19489473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52864 (or 52861 counting only the distinct ones).

The product of its digits is 217728, while the sum is 45.

The square root of 19489473 is about 4414.6883242195. The cubic root of 19489473 is about 269.1121867755.

The spelling of 19489473 in words is "nineteen million, four hundred eighty-nine thousand, four hundred seventy-three".