20380258 has 4 divisors (see below), whose sum is σ = 30570390. Its totient is φ = 10190128.

The previous prime is 20380253. The next prime is 20380259. The reversal of 20380258 is 85208302.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 85208302 = 2 ⋅42604151.

It can be written as a sum of positive squares in only one way, i.e., 13373649 + 7006609 = 3657^2 + 2647^2 .

It is a super-2 number, since 2×20380258² = 830709832293128, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20380253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5095063 + ... + 5095066.

Almost surely, 2^20380258 is an apocalyptic number.

20380258 is a deficient number, since it is larger than the sum of its proper divisors (10190132).

20380258 is a wasteful number, since it uses less digits than its factorization.

20380258 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10190131.

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 20380258 is about 4514.4499111187. The cubic root of 20380258 is about 273.1512711177.

The spelling of 20380258 in words is "twenty million, three hundred eighty thousand, two hundred fifty-eight".