10102020989 has 4 divisors (see below), whose sum is σ = 10102537824. Its totient is φ = 10101504156.

The previous prime is 10102020983. The next prime is 10102020991. The reversal of 10102020989 is 98902020101.

It is a happy number.

10102020989 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10102020989 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 (10102020983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 227897 + ... + 268590.

It is an arithmetic number, because the mean of its divisors is an integer number (2525634456).

Almost surely, 2^10102020989 is an apocalyptic number.

It is an amenable number.

10102020989 is a deficient number, since it is larger than the sum of its proper divisors (516835).

10102020989 is an equidigital number, since it uses as much as digits as its factorization.

10102020989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 516834.

The product of its (nonzero) digits is 2592, while the sum is 32.

The spelling of 10102020989 in words is "ten billion, one hundred two million, twenty thousand, nine hundred eighty-nine".