20617484 has 6 divisors (see below), whose sum is σ = 36080604. Its totient is φ = 10308740.

The previous prime is 20617469. The next prime is 20617517. The reversal of 20617484 is 48471602.

It is a super-4 number, since 4×20617484⁴ (a number of 30 digits) contains 4444 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20617484.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 2577182 + ... + 2577189.

It is an arithmetic number, because the mean of its divisors is an integer number (6013434).

Almost surely, 2^20617484 is an apocalyptic number.

It is an amenable number.

20617484 is a deficient number, since it is larger than the sum of its proper divisors (15463120).

20617484 is a wasteful number, since it uses less digits than its factorization.

20617484 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5154375 (or 5154373 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 32.

The square root of 20617484 is about 4540.6479713803. The cubic root of 20617484 is about 274.2070114079.

The spelling of 20617484 in words is "twenty million, six hundred seventeen thousand, four hundred eighty-four".