20458918385 has 16 divisors (see below), whose sum is σ = 24714123840. Its totient is φ = 16258536000.

The previous prime is 20458918339. The next prime is 20458918399. The reversal of 20458918385 is 58381985402.

It is not a de Polignac number, because 20458918385 - 2⁶ = 20458918321 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 454139 + ... + 497151.

It is an arithmetic number, because the mean of its divisors is an integer number (1544632740).

Almost surely, 2^20458918385 is an apocalyptic number.

It is an amenable number.

20458918385 is a deficient number, since it is larger than the sum of its proper divisors (4255205455).

20458918385 is a wasteful number, since it uses less digits than its factorization.

20458918385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43648.

The product of its (nonzero) digits is 2764800, while the sum is 53.

The spelling of 20458918385 in words is "twenty billion, four hundred fifty-eight million, nine hundred eighteen thousand, three hundred eighty-five".