102020563 has 4 divisors (see below), whose sum is σ = 102147480. Its totient is φ = 101893648.

The previous prime is 102020561. The next prime is 102020629. The reversal of 102020563 is 365020201.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 102020563 - 2¹ = 102020561 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 102020563.

It is not an unprimeable number, because it can be changed into a prime (102020561) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62245 + ... + 63862.

It is an arithmetic number, because the mean of its divisors is an integer number (25536870).

Almost surely, 2^102020563 is an apocalyptic number.

102020563 is a deficient number, since it is larger than the sum of its proper divisors (126917).

102020563 is an equidigital number, since it uses as much as digits as its factorization.

102020563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126916.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 102020563 is about 10100.5229072558. The cubic root of 102020563 is about 467.2642684695.

Adding to 102020563 its reverse (365020201), we get a palindrome (467040764).

The spelling of 102020563 in words is "one hundred two million, twenty thousand, five hundred sixty-three".