20382618 has 8 divisors (see below), whose sum is σ = 40765248. Its totient is φ = 6794204.

The previous prime is 20382613. The next prime is 20382619. The reversal of 20382618 is 81628302.

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

20382618 is an admirable number.

It is a super-2 number, since 2×20382618² = 830902233067848, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20382613) 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, 1698546 + ... + 1698557.

It is an arithmetic number, because the mean of its divisors is an integer number (5095656).

Almost surely, 2^20382618 is an apocalyptic number.

20382618 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

20382618 is a wasteful number, since it uses less digits than its factorization.

20382618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3397108.

The product of its (nonzero) digits is 4608, while the sum is 30.

The square root of 20382618 is about 4514.7112864501. The cubic root of 20382618 is about 273.1618141985.

It can be divided in two parts, 2038 and 2618, that added together give a triangular number (4656 = T₉₆).

The spelling of 20382618 in words is "twenty million, three hundred eighty-two thousand, six hundred eighteen".