18953047 has 2 divisors, whose sum is σ = 18953048. Its totient is φ = 18953046.

The previous prime is 18953041. The next prime is 18953083. The reversal of 18953047 is 74035981.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18953047 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 18952997 and 18953015.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18953041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9476523 + 9476524.

It is an arithmetic number, because the mean of its divisors is an integer number (9476524).

Almost surely, 2^18953047 is an apocalyptic number.

18953047 is the 2514-th hex number.

18953047 is a deficient number, since it is larger than the sum of its proper divisors (1).

18953047 is an equidigital number, since it uses as much as digits as its factorization.

18953047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30240, while the sum is 37.

The square root of 18953047 is about 4353.5097335368. The cubic root of 18953047 is about 266.6201774861.

The spelling of 18953047 in words is "eighteen million, nine hundred fifty-three thousand, forty-seven".