18547948 has 12 divisors (see below), whose sum is σ = 33009480. Its totient is φ = 9116672.

The previous prime is 18547937. The next prime is 18547957. The reversal of 18547948 is 84974581.

It is a junction number, because it is equal to n+sod(n) for n = 18547898 and 18547907.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39061 + ... + 39532.

It is an arithmetic number, because the mean of its divisors is an integer number (2750790).

Almost surely, 2^18547948 is an apocalyptic number.

It is an amenable number.

18547948 is a deficient number, since it is larger than the sum of its proper divisors (14461532).

18547948 is a wasteful number, since it uses less digits than its factorization.

18547948 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78656 (or 78654 counting only the distinct ones).

The product of its digits is 322560, while the sum is 46.

The square root of 18547948 is about 4306.7328684282. The cubic root of 18547948 is about 264.7069169885.

The spelling of 18547948 in words is "eighteen million, five hundred forty-seven thousand, nine hundred forty-eight".