20556192 has 48 divisors (see below), whose sum is σ = 54250560. Its totient is φ = 6815232.

The previous prime is 20556191. The next prime is 20556199. The reversal of 20556192 is 29165502.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-4 number, since 4×20556192⁴ (a number of 30 digits) contains 4444 as substring.

It is not an unprimeable number, because it can be changed into a prime (20556191) 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 7 ways as a sum of consecutive naturals, for example, 21909 + ... + 22827.

It is an arithmetic number, because the mean of its divisors is an integer number (1130220).

Almost surely, 2^20556192 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20556192, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27125280).

20556192 is an abundant number, since it is smaller than the sum of its proper divisors (33694368).

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

20556192 is a wasteful number, since it uses less digits than its factorization.

20556192 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1165 (or 1157 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 30.

The square root of 20556192 is about 4533.8936908578. The cubic root of 20556192 is about 273.9350193110.

The spelling of 20556192 in words is "twenty million, five hundred fifty-six thousand, one hundred ninety-two".