18847412 has 6 divisors (see below), whose sum is σ = 32982978. Its totient is φ = 9423704.

The previous prime is 18847403. The next prime is 18847429. The reversal of 18847412 is 21474881.

It can be written as a sum of positive squares in only one way, i.e., 17606416 + 1240996 = 4196^2 + 1114^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2355923 + ... + 2355930.

It is an arithmetic number, because the mean of its divisors is an integer number (5497163).

Almost surely, 2^18847412 is an apocalyptic number.

It is an amenable number.

18847412 is a deficient number, since it is larger than the sum of its proper divisors (14135566).

18847412 is a wasteful number, since it uses less digits than its factorization.

18847412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4711857 (or 4711855 counting only the distinct ones).

The product of its digits is 14336, while the sum is 35.

The square root of 18847412 is about 4341.3606162124. The cubic root of 18847412 is about 266.1239176152.

The spelling of 18847412 in words is "eighteen million, eight hundred forty-seven thousand, four hundred twelve".