18606996 has 54 divisors (see below), whose sum is σ = 48909770. Its totient is φ = 6193584.

The previous prime is 18606961. The next prime is 18606997. The reversal of 18606996 is 69960681.

It can be written as a sum of positive squares in only one way, i.e., 12702096 + 5904900 = 3564^2 + 2430^2 .

It is a tau number, because it is divible by the number of its divisors (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18606997) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 25890 + ... + 26598.

Almost surely, 2^18606996 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 18606996, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24454885).

18606996 is an abundant number, since it is smaller than the sum of its proper divisors (30302774).

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

18606996 is an frugal number, since it uses more digits than its factorization.

18606996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 737 (or 714 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 45.

The square root of 18606996 is about 4313.5827336450. The cubic root of 18606996 is about 264.9875204756.

The spelling of 18606996 in words is "eighteen million, six hundred six thousand, nine hundred ninety-six".