20570718 has 32 divisors (see below), whose sum is σ = 47153664. Its totient is φ = 5860512.

The previous prime is 20570713. The next prime is 20570723. The reversal of 20570718 is 81707502.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20570713) and next prime (20570723).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20570713) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26796 + ... + 27552.

It is an arithmetic number, because the mean of its divisors is an integer number (1473552).

Almost surely, 2^20570718 is an apocalyptic number.

20570718 is an abundant number, since it is smaller than the sum of its proper divisors (26582946).

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

20570718 is a wasteful number, since it uses less digits than its factorization.

20570718 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1416.

The product of its (nonzero) digits is 3920, while the sum is 30.

The square root of 20570718 is about 4535.4953422972. The cubic root of 20570718 is about 273.9995293650. Note that the first 3 decimals are identical.

The spelling of 20570718 in words is "twenty million, five hundred seventy thousand, seven hundred eighteen".