20011392 has 96 divisors (see below), whose sum is σ = 59670000. Its totient is φ = 6429696.

The previous prime is 20011373. The next prime is 20011423. The reversal of 20011392 is 29311002.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 33109 + ... + 33707.

Almost surely, 2^20011392 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 20011392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29835000).

20011392 is an abundant number, since it is smaller than the sum of its proper divisors (39658608).

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

20011392 is a wasteful number, since it uses less digits than its factorization.

20011392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 648 (or 633 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

The square root of 20011392 is about 4473.4094380014. The cubic root of 20011392 is about 271.4932896198.

Adding to 20011392 its reverse (29311002), we get a palindrome (49322394).

The spelling of 20011392 in words is "twenty million, eleven thousand, three hundred ninety-two".