20618020458 has 48 divisors (see below), whose sum is σ = 51215299200. Its totient is φ = 5872268448.

The previous prime is 20618020453. The next prime is 20618020463. The reversal of 20618020458 is 85402081602.

20618020458 is a `hidden beast` number, since 2 + 0 + 6 + 180 + 20 + 458 = 666.

It is an interprime number because it is at equal distance from previous prime (20618020453) and next prime (20618020463).

It is not an unprimeable number, because it can be changed into a prime (20618020453) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 218158 + ... + 298041.

It is an arithmetic number, because the mean of its divisors is an integer number (1066985400).

Almost surely, 2^20618020458 is an apocalyptic number.

20618020458 is an abundant number, since it is smaller than the sum of its proper divisors (30597278742).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20618020458 is a wasteful number, since it uses less digits than its factorization.

20618020458 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 516531 (or 516528 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 36.

The spelling of 20618020458 in words is "twenty billion, six hundred eighteen million, twenty thousand, four hundred fifty-eight".