18020770 has 8 divisors (see below), whose sum is σ = 32437404. Its totient is φ = 7208304.

The previous prime is 18020767. The next prime is 18020773. The reversal of 18020770 is 7702081.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (18020767) and next prime (18020773).

It can be written as a sum of positive squares in 2 ways, for example, as 17413929 + 606841 = 4173^2 + 779^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (18020773) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 901029 + ... + 901048.

Almost surely, 2^18020770 is an apocalyptic number.

18020770 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18020770 is a deficient number, since it is larger than the sum of its proper divisors (14416634).

18020770 is a wasteful number, since it uses less digits than its factorization.

18020770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1802084.

The product of its (nonzero) digits is 784, while the sum is 25.

The square root of 18020770 is about 4245.0877493875. The cubic root of 18020770 is about 262.1749021537.

The spelling of 18020770 in words is "eighteen million, twenty thousand, seven hundred seventy".