20471604 has 36 divisors (see below), whose sum is σ = 50750784. Its totient is φ = 6421376.

The previous prime is 20471603. The next prime is 20471639. The reversal of 20471604 is 40617402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20471603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 517 + ... + 6419.

It is an arithmetic number, because the mean of its divisors is an integer number (1409744).

Almost surely, 2^20471604 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 20471604, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25375392).

20471604 is an abundant number, since it is smaller than the sum of its proper divisors (30279180).

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

20471604 is a wasteful number, since it uses less digits than its factorization.

20471604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5944 (or 5925 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 24.

The square root of 20471604 is about 4524.5556687922. Note that the first 3 decimals coincide. The cubic root of 20471604 is about 273.5587584463.

The spelling of 20471604 in words is "twenty million, four hundred seventy-one thousand, six hundred four".