20411388 has 36 divisors (see below), whose sum is σ = 52255840. Its totient is φ = 6716736.

The previous prime is 20411387. The next prime is 20411411. The reversal of 20411388 is 88311402.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20411381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 745 + ... + 6432.

Almost surely, 2^20411388 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 20411388, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26127920).

20411388 is an abundant number, since it is smaller than the sum of its proper divisors (31844452).

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

20411388 is a wasteful number, since it uses less digits than its factorization.

20411388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7266 (or 7261 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 27.

The square root of 20411388 is about 4517.8964131551. The cubic root of 20411388 is about 273.2902761181.

The spelling of 20411388 in words is "twenty million, four hundred eleven thousand, three hundred eighty-eight".