20073570 has 64 divisors (see below), whose sum is σ = 53498880. Its totient is φ = 4779200.

The previous prime is 20073563. The next prime is 20073577. The reversal of 20073570 is 7537002.

It is an interprime number because it is at equal distance from previous prime (20073563) and next prime (20073577).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 20073570.

It is not an unprimeable number, because it can be changed into a prime (20073577) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18955 + ... + 19985.

It is an arithmetic number, because the mean of its divisors is an integer number (835920).

Almost surely, 2^20073570 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20073570, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26749440).

20073570 is an abundant number, since it is smaller than the sum of its proper divisors (33425310).

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

20073570 is a wasteful number, since it uses less digits than its factorization.

20073570 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1111.

The product of its (nonzero) digits is 1470, while the sum is 24.

The square root of 20073570 is about 4480.3537806740. The cubic root of 20073570 is about 271.7741872230.

The spelling of 20073570 in words is "twenty million, seventy-three thousand, five hundred seventy".