20164480 has 96 divisors (see below), whose sum is σ = 56163240. Its totient is φ = 6902784.

The previous prime is 20164451. The next prime is 20164481. The reversal of 20164480 is 8446102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20164481) 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, 31039 + ... + 31681.

Almost surely, 2^20164480 is an apocalyptic number.

20164480 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 20164480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28081620).

20164480 is an abundant number, since it is smaller than the sum of its proper divisors (35998760).

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

20164480 is an equidigital number, since it uses as much as digits as its factorization.

20164480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 676 (or 657 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 25.

The square root of 20164480 is about 4490.4877240674. The cubic root of 20164480 is about 272.1838434179.

The spelling of 20164480 in words is "twenty million, one hundred sixty-four thousand, four hundred eighty".