16950620989 has 2 divisors, whose sum is σ = 16950620990. Its totient is φ = 16950620988.

The previous prime is 16950620987. The next prime is 16950621019. The reversal of 16950620989 is 98902605961.

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., 13060604089 + 3890016900 = 114283^2 + 62370^2 .

It is a cyclic number.

It is not a de Polignac number, because 16950620989 - 2¹ = 16950620987 is a prime.

Together with 16950620987, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16950620987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8475310494 + 8475310495.

It is an arithmetic number, because the mean of its divisors is an integer number (8475310495).

Almost surely, 2^16950620989 is an apocalyptic number.

It is an amenable number.

16950620989 is a deficient number, since it is larger than the sum of its proper divisors (1).

16950620989 is an equidigital number, since it uses as much as digits as its factorization.

16950620989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2099520, while the sum is 55.

The spelling of 16950620989 in words is "sixteen billion, nine hundred fifty million, six hundred twenty thousand, nine hundred eighty-nine".