20458028 has 6 divisors (see below), whose sum is σ = 35801556. Its totient is φ = 10229012.

The previous prime is 20458027. The next prime is 20458033. The reversal of 20458028 is 82085402.

It is not an unprimeable number, because it can be changed into a prime (20458027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2557250 + ... + 2557257.

It is an arithmetic number, because the mean of its divisors is an integer number (5966926).

Almost surely, 2^20458028 is an apocalyptic number.

It is an amenable number.

20458028 is a deficient number, since it is larger than the sum of its proper divisors (15343528).

20458028 is a wasteful number, since it uses less digits than its factorization.

20458028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5114511 (or 5114509 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 29.

The square root of 20458028 is about 4523.0551621664. The cubic root of 20458028 is about 273.4982737710.

The spelling of 20458028 in words is "twenty million, four hundred fifty-eight thousand, twenty-eight".