20280162 has 16 divisors (see below), whose sum is σ = 46354752. Its totient is φ = 5794320.

The previous prime is 20280157. The next prime is 20280187. The reversal of 20280162 is 26108202.

It is a super-2 number, since 2×20280162² = 822569941492488, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 241389 + ... + 241472.

It is an arithmetic number, because the mean of its divisors is an integer number (2897172).

Almost surely, 2^20280162 is an apocalyptic number.

20280162 is an abundant number, since it is smaller than the sum of its proper divisors (26074590).

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

20280162 is a wasteful number, since it uses less digits than its factorization.

20280162 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 482873.

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 20280162 is about 4503.3500863246. The cubic root of 20280162 is about 272.7033501643.

Adding to 20280162 its reverse (26108202), we get a palindrome (46388364).

The spelling of 20280162 in words is "twenty million, two hundred eighty thousand, one hundred sixty-two".