19640129 has 8 divisors (see below), whose sum is σ = 20791680. Its totient is φ = 18500400.

The previous prime is 19640123. The next prime is 19640209. The reversal of 19640129 is 92104691.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 19640129 - 2⁴ = 19640113 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 19640095 and 19640104.

It is not an unprimeable number, because it can be changed into a prime (19640123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 584 + ... + 6294.

It is an arithmetic number, because the mean of its divisors is an integer number (2598960).

Almost surely, 2^19640129 is an apocalyptic number.

19640129 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

19640129 is a deficient number, since it is larger than the sum of its proper divisors (1151551).

19640129 is a wasteful number, since it uses less digits than its factorization.

19640129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5911.

The product of its (nonzero) digits is 3888, while the sum is 32.

The square root of 19640129 is about 4431.7185154294. The cubic root of 19640129 is about 269.8038309872.

The spelling of 19640129 in words is "nineteen million, six hundred forty thousand, one hundred twenty-nine".