20641392 has 60 divisors (see below), whose sum is σ = 59918040. Its totient is φ = 6879168.

The previous prime is 20641351. The next prime is 20641393. The reversal of 20641392 is 29314602.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20641393) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1234 + ... + 6542.

It is an arithmetic number, because the mean of its divisors is an integer number (998634).

Almost surely, 2^20641392 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 20641392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29959020).

20641392 is an abundant number, since it is smaller than the sum of its proper divisors (39276648).

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

20641392 is an equidigital number, since it uses as much as digits as its factorization.

20641392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5332 (or 5314 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 20641392 is about 4543.2798725150. The cubic root of 20641392 is about 274.3129604631.

Adding to 20641392 its reverse (29314602), we get a palindrome (49955994).

The spelling of 20641392 in words is "twenty million, six hundred forty-one thousand, three hundred ninety-two".