20053398509 has 8 divisors (see below), whose sum is σ = 21235550400. Its totient is φ = 18871528896.

The previous prime is 20053398503. The next prime is 20053398511. The reversal of 20053398509 is 90589335002.

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 20053398509 - 2²⁸ = 19784963053 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20053398509.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20053398503) 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 7 ways as a sum of consecutive naturals, for example, 85592 + ... + 217790.

It is an arithmetic number, because the mean of its divisors is an integer number (2654443800).

Almost surely, 2^20053398509 is an apocalyptic number.

It is an amenable number.

20053398509 is a deficient number, since it is larger than the sum of its proper divisors (1182151891).

20053398509 is a wasteful number, since it uses less digits than its factorization.

20053398509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141139.

The product of its (nonzero) digits is 291600, while the sum is 44.

The spelling of 20053398509 in words is "twenty billion, fifty-three million, three hundred ninety-eight thousand, five hundred nine".