20156324 has 24 divisors (see below), whose sum is σ = 37110528. Its totient is φ = 9565920.

The previous prime is 20156317. The next prime is 20156329. The reversal of 20156324 is 42365102.

It is a self number, because there is not a number n which added to its sum of digits gives 20156324.

It is not an unprimeable number, because it can be changed into a prime (20156329) by changing a digit.

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, 5039 + ... + 8105.

It is an arithmetic number, because the mean of its divisors is an integer number (1546272).

Almost surely, 2^20156324 is an apocalyptic number.

It is an amenable number.

20156324 is a deficient number, since it is larger than the sum of its proper divisors (16954204).

20156324 is a wasteful number, since it uses less digits than its factorization.

20156324 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3155 (or 3153 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 20156324 is about 4489.5794903309. The cubic root of 20156324 is about 272.1471414086.

The spelling of 20156324 in words is "twenty million, one hundred fifty-six thousand, three hundred twenty-four".