20915084 has 24 divisors (see below), whose sum is σ = 38029488. Its totient is φ = 10056960.

The previous prime is 20915053. The next prime is 20915107. The reversal of 20915084 is 48051902.

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, 11099 + ... + 12845.

It is an arithmetic number, because the mean of its divisors is an integer number (1584562).

Almost surely, 2^20915084 is an apocalyptic number.

It is an amenable number.

20915084 is a deficient number, since it is larger than the sum of its proper divisors (17114404).

20915084 is a wasteful number, since it uses less digits than its factorization.

20915084 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1865 (or 1863 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 20915084 is about 4573.3012146588. The cubic root of 20915084 is about 275.5200473333.

Adding to 20915084 its reverse (48051902), we get a palindrome (68966986).

The spelling of 20915084 in words is "twenty million, nine hundred fifteen thousand, eighty-four".