20503250377 has 2 divisors, whose sum is σ = 20503250378. Its totient is φ = 20503250376.

The previous prime is 20503250359. The next prime is 20503250407. The reversal of 20503250377 is 77305230502.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20242460176 + 260790201 = 142276^2 + 16149^2 .

It is a cyclic number.

It is not a de Polignac number, because 20503250377 - 2¹¹ = 20503248329 is a prime.

It is not a weakly prime, because it can be changed into another prime (20503250077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10251625188 + 10251625189.

It is an arithmetic number, because the mean of its divisors is an integer number (10251625189).

Almost surely, 2^20503250377 is an apocalyptic number.

It is an amenable number.

20503250377 is a deficient number, since it is larger than the sum of its proper divisors (1).

20503250377 is an equidigital number, since it uses as much as digits as its factorization.

20503250377 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 44100, while the sum is 34.

Adding to 20503250377 its reverse (77305230502), we get a palindrome (97808480879).

The spelling of 20503250377 in words is "twenty billion, five hundred three million, two hundred fifty thousand, three hundred seventy-seven".