18434020 has 24 divisors (see below), whose sum is σ = 42231168. Its totient is φ = 6703200.

The previous prime is 18433999. The next prime is 18434021. The reversal of 18434020 is 2043481.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 18433982 and 18434000.

It is not an unprimeable number, because it can be changed into a prime (18434021) 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, 41676 + ... + 42115.

It is an arithmetic number, because the mean of its divisors is an integer number (1759632).

Almost surely, 2^18434020 is an apocalyptic number.

18434020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18434020 is an abundant number, since it is smaller than the sum of its proper divisors (23797148).

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

18434020 is a wasteful number, since it uses less digits than its factorization.

18434020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83811 (or 83809 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 18434020 is about 4293.4857633396. The cubic root of 18434020 is about 264.1638292886.

The spelling of 18434020 in words is "eighteen million, four hundred thirty-four thousand, twenty".