18420696 has 160 divisors (see below), whose sum is σ = 61332480. Its totient is φ = 5054400.

The previous prime is 18420691. The next prime is 18420739. The reversal of 18420696 is 69602481.

18420696 is nontrivially palindromic in base 5.

It is a super-2 number, since 2×18420696² = 678644082248832, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 18420696.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18420691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 140551 + ... + 140681.

It is an arithmetic number, because the mean of its divisors is an integer number (383328).

Almost surely, 2^18420696 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18420696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30666240).

18420696 is an abundant number, since it is smaller than the sum of its proper divisors (42911784).

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

18420696 is a wasteful number, since it uses less digits than its factorization.

18420696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187 (or 174 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 18420696 is about 4291.9338298720. The cubic root of 18420696 is about 264.1001686001.

The spelling of 18420696 in words is "eighteen million, four hundred twenty thousand, six hundred ninety-six".