20156162 has 8 divisors (see below), whose sum is σ = 32559996. Its totient is φ = 9302832.

The previous prime is 20156153. The next prime is 20156177. The reversal of 20156162 is 26165102.

It can be written as a sum of positive squares in 2 ways, for example, as 20151121 + 5041 = 4489^2 + 71^2 .

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

It is an unprimeable number.

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, 387593 + ... + 387644.

Almost surely, 2^20156162 is an apocalyptic number.

20156162 is a deficient number, since it is larger than the sum of its proper divisors (12403834).

20156162 is a wasteful number, since it uses less digits than its factorization.

20156162 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 775252.

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

The square root of 20156162 is about 4489.5614485159. The cubic root of 20156162 is about 272.1464123082.

The spelling of 20156162 in words is "twenty million, one hundred fifty-six thousand, one hundred sixty-two".