20654164 has 12 divisors (see below), whose sum is σ = 36191988. Its totient is φ = 10313600.

The previous prime is 20654143. The next prime is 20654171. The reversal of 20654164 is 46145602.

It can be written as a sum of positive squares in 2 ways, for example, as 6290064 + 14364100 = 2508^2 + 3790^2 .

It is a congruent number.

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 in 3 ways as a sum of consecutive naturals, for example, 594 + ... + 6454.

It is an arithmetic number, because the mean of its divisors is an integer number (3015999).

Almost surely, 2^20654164 is an apocalyptic number.

It is an amenable number.

20654164 is a deficient number, since it is larger than the sum of its proper divisors (15537824).

20654164 is a wasteful number, since it uses less digits than its factorization.

20654164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6746 (or 6744 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 20654164 is about 4544.6852476272. The cubic root of 20654164 is about 274.3695264603.

Adding to 20654164 its reverse (46145602), we get a palindrome (66799766).

The spelling of 20654164 in words is "twenty million, six hundred fifty-four thousand, one hundred sixty-four".