18469625389 has 2 divisors, whose sum is σ = 18469625390. Its totient is φ = 18469625388.

The previous prime is 18469625387. The next prime is 18469625411. The reversal of 18469625389 is 98352696481.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14075924164 + 4393701225 = 118642^2 + 66285^2 .

It is a cyclic number.

It is not a de Polignac number, because 18469625389 - 2¹ = 18469625387 is a prime.

It is a super-2 number, since 2×18469625389² (a number of 21 digits) contains 22 as substring.

Together with 18469625387, 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 (18469625387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9234812694 + 9234812695.

It is an arithmetic number, because the mean of its divisors is an integer number (9234812695).

Almost surely, 2^18469625389 is an apocalyptic number.

It is an amenable number.

18469625389 is a deficient number, since it is larger than the sum of its proper divisors (1).

18469625389 is an equidigital number, since it uses as much as digits as its factorization.

18469625389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 22394880, while the sum is 61.

The spelling of 18469625389 in words is "eighteen billion, four hundred sixty-nine million, six hundred twenty-five thousand, three hundred eighty-nine".