20001258 has 12 divisors (see below), whose sum is σ = 43336098. Its totient is φ = 6667080.

The previous prime is 20001253. The next prime is 20001259. The reversal of 20001258 is 85210002.

It can be written as a sum of positive squares in only one way, i.e., 13816089 + 6185169 = 3717^2 + 2487^2 .

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 1111181 = 20001258 / (2 + 0 + 0 + 0 + 1 + 2 + 5 + 8).

It is a self number, because there is not a number n which added to its sum of digits gives 20001258.

It is not an unprimeable number, because it can be changed into a prime (20001253) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 555573 + ... + 555608.

Almost surely, 2^20001258 is an apocalyptic number.

20001258 is an abundant number, since it is smaller than the sum of its proper divisors (23334840).

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

20001258 is a wasteful number, since it uses less digits than its factorization.

20001258 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1111189 (or 1111186 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 20001258 is about 4472.2766014637. The cubic root of 20001258 is about 271.4474527691.

The spelling of 20001258 in words is "twenty million, one thousand, two hundred fifty-eight".