20911392 has 48 divisors (see below), whose sum is σ = 60994080. Its totient is φ = 6970176.

The previous prime is 20911339. The next prime is 20911403. The reversal of 20911392 is 29311902.

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

It is a Harshad number since it is a multiple of its sum of digits (27).

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 7 ways as a sum of consecutive naturals, for example, 11238 + ... + 12965.

It is an arithmetic number, because the mean of its divisors is an integer number (1270710).

Almost surely, 2^20911392 is an apocalyptic number.

It is an amenable number.

20911392 is an abundant number, since it is smaller than the sum of its proper divisors (40082688).

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

20911392 is a wasteful number, since it uses less digits than its factorization.

20911392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24222 (or 24208 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 27.

The square root of 20911392 is about 4572.8975496943. The cubic root of 20911392 is about 275.5038344751.

The spelling of 20911392 in words is "twenty million, nine hundred eleven thousand, three hundred ninety-two".