10204661989 has 2 divisors, whose sum is σ = 10204661990. Its totient is φ = 10204661988.

The previous prime is 10204661983. The next prime is 10204662037. The reversal of 10204661989 is 98916640201.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9888711364 + 315950625 = 99442^2 + 17775^2 .

It is a cyclic number.

It is not a de Polignac number, because 10204661989 - 2³ = 10204661981 is a prime.

It is a super-2 number, since 2×10204661989² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10204661981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5102330994 + 5102330995.

It is an arithmetic number, because the mean of its divisors is an integer number (5102330995).

Almost surely, 2^10204661989 is an apocalyptic number.

It is an amenable number.

10204661989 is a deficient number, since it is larger than the sum of its proper divisors (1).

10204661989 is an equidigital number, since it uses as much as digits as its factorization.

10204661989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 186624, while the sum is 46.

The spelling of 10204661989 in words is "ten billion, two hundred four million, six hundred sixty-one thousand, nine hundred eighty-nine".