18143970 has 32 divisors (see below), whose sum is σ = 46896192. Its totient is φ = 4466112.

The previous prime is 18143969. The next prime is 18143971. The reversal of 18143970 is 7934181.

It is an interprime number because it is at equal distance from previous prime (18143969) and next prime (18143971).

It is not an unprimeable number, because it can be changed into a prime (18143971) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22872 + ... + 23651.

It is an arithmetic number, because the mean of its divisors is an integer number (1465506).

Almost surely, 2^18143970 is an apocalyptic number.

18143970 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18143970 is an abundant number, since it is smaller than the sum of its proper divisors (28752222).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18143970 is a wasteful number, since it uses less digits than its factorization.

18143970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46546.

The product of its (nonzero) digits is 6048, while the sum is 33.

The square root of 18143970 is about 4259.5739223542. The cubic root of 18143970 is about 262.7710035678.

The spelling of 18143970 in words is "eighteen million, one hundred forty-three thousand, nine hundred seventy".