20161562 has 8 divisors (see below), whose sum is σ = 30369600. Its totient is φ = 10038364.

The previous prime is 20161553. The next prime is 20161567. The reversal of 20161562 is 26516102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (20161567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20612 + ... + 21567.

It is an arithmetic number, because the mean of its divisors is an integer number (3796200).

Almost surely, 2^20161562 is an apocalyptic number.

20161562 is a deficient number, since it is larger than the sum of its proper divisors (10208038).

20161562 is a wasteful number, since it uses less digits than its factorization.

20161562 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42420.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 20161562 is about 4490.1628032845. The cubic root of 20161562 is about 272.1707135518.

Adding to 20161562 its reverse (26516102), we get a palindrome (46677664).

The spelling of 20161562 in words is "twenty million, one hundred sixty-one thousand, five hundred sixty-two".