17900909429 has 12 divisors (see below), whose sum is σ = 19435039200. Its totient is φ = 16480258704.

The previous prime is 17900909399. The next prime is 17900909437. The reversal of 17900909429 is 92490900971.

It is a de Polignac number, because none of the positive numbers 2^k-17900909429 is a prime.

It is a super-2 number, since 2×17900909429² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (17930909429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 75689 + ... + 203790.

It is an arithmetic number, because the mean of its divisors is an integer number (1619586600).

Almost surely, 2^17900909429 is an apocalyptic number.

It is an amenable number.

17900909429 is a deficient number, since it is larger than the sum of its proper divisors (1534129771).

17900909429 is a wasteful number, since it uses less digits than its factorization.

17900909429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 279884 (or 279871 counting only the distinct ones).

The product of its (nonzero) digits is 367416, while the sum is 50.

The spelling of 17900909429 in words is "seventeen billion, nine hundred million, nine hundred nine thousand, four hundred twenty-nine".