10020557 has 4 divisors (see below), whose sum is σ = 10027356. Its totient is φ = 10013760.

The previous prime is 10020547. The next prime is 10020559. The reversal of 10020557 is 75502001.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 4351396 + 5669161 = 2086^2 + 2381^2 .

It is a cyclic number.

It is not a de Polignac number, because 10020557 - 2¹⁰ = 10019533 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10020559) 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 in 3 ways as a sum of consecutive naturals, for example, 158 + ... + 4479.

It is an arithmetic number, because the mean of its divisors is an integer number (2506839).

Almost surely, 2^10020557 is an apocalyptic number.

It is an amenable number.

10020557 is a deficient number, since it is larger than the sum of its proper divisors (6799).

10020557 is an equidigital number, since it uses as much as digits as its factorization.

10020557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6798.

The product of its (nonzero) digits is 350, while the sum is 20.

The square root of 10020557 is about 3165.5263385415. The cubic root of 10020557 is about 215.5909970046.

Adding to 10020557 its reverse (75502001), we get a palindrome (85522558).

It can be divided in two parts, 1002055 and 7, that multiplied together give a triangular number (7014385 = T₃₇₄₅).

The spelling of 10020557 in words is "ten million, twenty thousand, five hundred fifty-seven".