20500364 has 12 divisors (see below), whose sum is σ = 36114288. Its totient is φ = 10182000.

The previous prime is 20500357. The next prime is 20500367. The reversal of 20500364 is 46300502.

20500364 = T₂₀₇ + T₂₀₈ + ... + T₅₀₈.

It is not an unprimeable number, because it can be changed into a prime (20500367) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 16367 + ... + 17574.

It is an arithmetic number, because the mean of its divisors is an integer number (3009524).

Almost surely, 2^20500364 is an apocalyptic number.

It is an amenable number.

20500364 is a deficient number, since it is larger than the sum of its proper divisors (15613924).

20500364 is a wasteful number, since it uses less digits than its factorization.

20500364 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34096 (or 34094 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 20500364 is about 4527.7327659658. The cubic root of 20500364 is about 273.6868035906.

Adding to 20500364 its reverse (46300502), we get a palindrome (66800866).

The spelling of 20500364 in words is "twenty million, five hundred thousand, three hundred sixty-four".