47320018 has 16 divisors (see below), whose sum is σ = 72399384. Its totient is φ = 23189760.

The previous prime is 47319997. The next prime is 47320057. The reversal of 47320018 is 81002374.

It can be written as a sum of positive squares in 4 ways, for example, as 41951529 + 5368489 = 6477^2 + 2317^2 .

It is a junction number, because it is equal to n+sod(n) for n = 47319974 and 47320001.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47946 + ... + 48922.

Almost surely, 2^47320018 is an apocalyptic number.

47320018 is a deficient number, since it is larger than the sum of its proper divisors (25079366).

47320018 is a wasteful number, since it uses less digits than its factorization.

47320018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1437.

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 47320018 is about 6878.9547171064. The cubic root of 47320018 is about 361.6998264551.

The spelling of 47320018 in words is "forty-seven million, three hundred twenty thousand, eighteen".