20558148 has 24 divisors (see below), whose sum is σ = 51659328. Its totient is φ = 6325536.

The previous prime is 20558143. The next prime is 20558149. The reversal of 20558148 is 84185502.

It is not an unprimeable number, because it can be changed into a prime (20558143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65736 + ... + 66047.

It is an arithmetic number, because the mean of its divisors is an integer number (2152472).

Almost surely, 2^20558148 is an apocalyptic number.

It is an amenable number.

20558148 is an abundant number, since it is smaller than the sum of its proper divisors (31101180).

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

20558148 is a wasteful number, since it uses less digits than its factorization.

20558148 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131803 (or 131801 counting only the distinct ones).

The product of its (nonzero) digits is 12800, while the sum is 33.

The square root of 20558148 is about 4534.1093943574. The cubic root of 20558148 is about 273.9437076891.

It can be divided in two parts, 20558 and 148, that added together give a triangular number (20706 = T₂₀₃).

The spelling of 20558148 in words is "twenty million, five hundred fifty-eight thousand, one hundred forty-eight".