18433970 has 16 divisors (see below), whose sum is σ = 33271128. Its totient is φ = 7353600.

The previous prime is 18433963. The next prime is 18433979. The reversal of 18433970 is 7933481.

It can be written as a sum of positive squares in 4 ways, for example, as 15928081 + 2505889 = 3991^2 + 1583^2 .

It is a super-2 number, since 2×18433970² = 679622499921800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18433970.

It is not an unprimeable number, because it can be changed into a prime (18433979) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1712 + ... + 6308.

Almost surely, 2^18433970 is an apocalyptic number.

18433970 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18433970 is a deficient number, since it is larger than the sum of its proper divisors (14837158).

18433970 is a wasteful number, since it uses less digits than its factorization.

18433970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5005.

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 18433970 is about 4293.4799405610. The cubic root of 18433970 is about 264.1635904511.

The spelling of 18433970 in words is "eighteen million, four hundred thirty-three thousand, nine hundred seventy".