20738480 has 80 divisors (see below), whose sum is σ = 57049920. Its totient is φ = 6859776.

The previous prime is 20738467. The next prime is 20738483. The reversal of 20738480 is 8483702.

It is a tau number, because it is divible by the number of its divisors (80).

It is not an unprimeable number, because it can be changed into a prime (20738483) 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, 15602 + ... + 16878.

It is an arithmetic number, because the mean of its divisors is an integer number (713124).

Almost surely, 2^20738480 is an apocalyptic number.

20738480 is a gapful number since it is divisible by the number (20) 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 20738480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28524960).

20738480 is an abundant number, since it is smaller than the sum of its proper divisors (36311440).

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

20738480 is a wasteful number, since it uses less digits than its factorization.

20738480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1326 (or 1320 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 32.

The square root of 20738480 is about 4553.9521297440. The cubic root of 20738480 is about 274.7423702890.

The spelling of 20738480 in words is "twenty million, seven hundred thirty-eight thousand, four hundred eighty".