20675480 has 64 divisors (see below), whose sum is σ = 54492480. Its totient is φ = 6912000.

The previous prime is 20675471. The next prime is 20675483. The reversal of 20675480 is 8457602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20675483) 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, 10580 + ... + 12380.

It is an arithmetic number, because the mean of its divisors is an integer number (851445).

Almost surely, 2^20675480 is an apocalyptic number.

20675480 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 20675480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27246240).

20675480 is an abundant number, since it is smaller than the sum of its proper divisors (33817000).

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

20675480 is a wasteful number, since it uses less digits than its factorization.

20675480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1860 (or 1856 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 32.

The square root of 20675480 is about 4547.0297997704. The cubic root of 20675480 is about 274.4638811228.

The spelling of 20675480 in words is "twenty million, six hundred seventy-five thousand, four hundred eighty".