20458716 has 12 divisors (see below), whose sum is σ = 47737032. Its totient is φ = 6819568.

The previous prime is 20458703. The next prime is 20458723. The reversal of 20458716 is 61785402.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 852435 + ... + 852458.

It is an arithmetic number, because the mean of its divisors is an integer number (3978086).

Almost surely, 2^20458716 is an apocalyptic number.

It is an amenable number.

20458716 is an abundant number, since it is smaller than the sum of its proper divisors (27278316).

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

20458716 is a wasteful number, since it uses less digits than its factorization.

20458716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1704900 (or 1704898 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 33.

The square root of 20458716 is about 4523.1312163146. The cubic root of 20458716 is about 273.5013396367.

The spelling of 20458716 in words is "twenty million, four hundred fifty-eight thousand, seven hundred sixteen".