20320377 has 32 divisors (see below), whose sum is σ = 34105344. Its totient is φ = 10541520.

The previous prime is 20320373. The next prime is 20320409. The reversal of 20320377 is 77302302.

It is not a de Polignac number, because 20320377 - 2² = 20320373 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20320373) 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 31 ways as a sum of consecutive naturals, for example, 27588 + ... + 28314.

It is an arithmetic number, because the mean of its divisors is an integer number (1065792).

Almost surely, 2^20320377 is an apocalyptic number.

It is an amenable number.

20320377 is a deficient number, since it is larger than the sum of its proper divisors (13784967).

20320377 is an equidigital number, since it uses as much as digits as its factorization.

20320377 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 770 (or 748 counting only the distinct ones).

The product of its (nonzero) digits is 1764, while the sum is 24.

The square root of 20320377 is about 4507.8128843154. The cubic root of 20320377 is about 272.8834855477.

Adding to 20320377 its reverse (77302302), we get a palindrome (97622679).

The spelling of 20320377 in words is "twenty million, three hundred twenty thousand, three hundred seventy-seven".