20604620 has 24 divisors (see below), whose sum is σ = 43355088. Its totient is φ = 8225600.

The previous prime is 20604613. The next prime is 20604679. The reversal of 20604620 is 2640602.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 20604592 and 20604601.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18890 + ... + 19950.

It is an arithmetic number, because the mean of its divisors is an integer number (1806462).

Almost surely, 2^20604620 is an apocalyptic number.

20604620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20604620 is an abundant number, since it is smaller than the sum of its proper divisors (22750468).

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

20604620 is a wasteful number, since it uses less digits than its factorization.

20604620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2041 (or 2039 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 20604620 is about 4539.2312124412. The cubic root of 20604620 is about 274.1499702921.

The spelling of 20604620 in words is "twenty million, six hundred four thousand, six hundred twenty".