20604108 has 72 divisors (see below), whose sum is σ = 56868672. Its totient is φ = 5787936.

The previous prime is 20604107. The next prime is 20604131. The reversal of 20604108 is 80140602.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (20604107) 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, 39135 + ... + 39657.

Almost surely, 2^20604108 is an apocalyptic number.

20604108 is a gapful number since it is divisible by the number (28) 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 20604108, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28434336).

20604108 is an abundant number, since it is smaller than the sum of its proper divisors (36264564).

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

20604108 is a wasteful number, since it uses less digits than its factorization.

20604108 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 611 (or 602 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 20604108 is about 4539.1748148755. The cubic root of 20604108 is about 274.1476995077.

The spelling of 20604108 in words is "twenty million, six hundred four thousand, one hundred eight".