20479704 has 64 divisors (see below), whose sum is σ = 59001600. Its totient is φ = 5802624.

The previous prime is 20479703. The next prime is 20479709. The reversal of 20479704 is 40797402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20479703) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22914 + ... + 23790.

It is an arithmetic number, because the mean of its divisors is an integer number (921900).

Almost surely, 2^20479704 is an apocalyptic number.

20479704 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20479704, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29500800).

20479704 is an abundant number, since it is smaller than the sum of its proper divisors (38521896).

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

20479704 is a wasteful number, since it uses less digits than its factorization.

20479704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1032 (or 1028 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 33.

The square root of 20479704 is about 4525.4506957871. The cubic root of 20479704 is about 273.5948333555.

The spelling of 20479704 in words is "twenty million, four hundred seventy-nine thousand, seven hundred four".