20603764 has 6 divisors (see below), whose sum is σ = 36056594. Its totient is φ = 10301880.

The previous prime is 20603761. The next prime is 20603777. The reversal of 20603764 is 46730602.

It can be written as a sum of positive squares in only one way, i.e., 18558864 + 2044900 = 4308^2 + 1430^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20603761) 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 as a sum of consecutive naturals, namely, 2575467 + ... + 2575474.

Almost surely, 2^20603764 is an apocalyptic number.

It is an amenable number.

20603764 is a deficient number, since it is larger than the sum of its proper divisors (15452830).

20603764 is a wasteful number, since it uses less digits than its factorization.

20603764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5150945 (or 5150943 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 28.

The square root of 20603764 is about 4539.1369223675. The cubic root of 20603764 is about 274.1461738034.

The spelling of 20603764 in words is "twenty million, six hundred three thousand, seven hundred sixty-four".