18493047 has 12 divisors (see below), whose sum is σ = 26751504. Its totient is φ = 12310560.

The previous prime is 18493021. The next prime is 18493073. The reversal of 18493047 is 74039481.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (18493021) and next prime (18493073).

It is not a de Polignac number, because 18493047 - 2¹¹ = 18490999 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18423047) 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, 8283 + ... + 10275.

It is an arithmetic number, because the mean of its divisors is an integer number (2229292).

Almost surely, 2^18493047 is an apocalyptic number.

18493047 is a deficient number, since it is larger than the sum of its proper divisors (8258457).

18493047 is a wasteful number, since it uses less digits than its factorization.

18493047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3030 (or 3027 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 18493047 is about 4300.3542877303. The cubic root of 18493047 is about 264.4454857915.

The spelling of 18493047 in words is "eighteen million, four hundred ninety-three thousand, forty-seven".