18830020 has 72 divisors (see below), whose sum is σ = 45045504. Its totient is φ = 6600000.

The previous prime is 18829919. The next prime is 18830023. The reversal of 18830020 is 2003881.

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 = 18829973 and 18830000.

It is not an unprimeable number, because it can be changed into a prime (18830023) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 74895 + ... + 75145.

It is an arithmetic number, because the mean of its divisors is an integer number (625632).

Almost surely, 2^18830020 is an apocalyptic number.

18830020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18830020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22522752).

18830020 is an abundant number, since it is smaller than the sum of its proper divisors (26215484).

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

18830020 is a wasteful number, since it uses less digits than its factorization.

18830020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 313 (or 300 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 22.

The square root of 18830020 is about 4339.3570952389. The cubic root of 18830020 is about 266.0420345504.

It can be divided in two parts, 18 and 830020, that added together give a palindrome (830038).

The spelling of 18830020 in words is "eighteen million, eight hundred thirty thousand, twenty".