20557383329 has 8 divisors (see below), whose sum is σ = 23594987520. Its totient is φ = 17544987936.

The previous prime is 20557383281. The next prime is 20557383337. The reversal of 20557383329 is 92338375502.

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

It is not a de Polignac number, because 20557383329 - 2¹⁶ = 20557317793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20557383389) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6300449 + ... + 6303710.

It is an arithmetic number, because the mean of its divisors is an integer number (2949373440).

Almost surely, 2^20557383329 is an apocalyptic number.

It is an amenable number.

20557383329 is a deficient number, since it is larger than the sum of its proper divisors (3037604191).

20557383329 is a wasteful number, since it uses less digits than its factorization.

20557383329 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12604399.

The product of its (nonzero) digits is 1360800, while the sum is 47.

The spelling of 20557383329 in words is "twenty billion, five hundred fifty-seven million, three hundred eighty-three thousand, three hundred twenty-nine".