20530377 has 24 divisors (see below), whose sum is σ = 34027136. Its totient is φ = 11684736.

The previous prime is 20530351. The next prime is 20530397. The reversal of 20530377 is 77303502.

It is not a de Polignac number, because 20530377 - 2⁶ = 20530313 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20530377.

It is not an unprimeable number, because it can be changed into a prime (20530327) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 20748 + ... + 21714.

Almost surely, 2^20530377 is an apocalyptic number.

It is an amenable number.

20530377 is a deficient number, since it is larger than the sum of its proper divisors (13496759).

20530377 is a wasteful number, since it uses less digits than its factorization.

20530377 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1317 (or 1314 counting only the distinct ones).

The product of its (nonzero) digits is 4410, while the sum is 27.

The square root of 20530377 is about 4531.0459057485. The cubic root of 20530377 is about 273.8202997035.

Adding to 20530377 its reverse (77303502), we get a palindrome (97833879).

The spelling of 20530377 in words is "twenty million, five hundred thirty thousand, three hundred seventy-seven".