20483540 has 96 divisors (see below), whose sum is σ = 54964224. Its totient is φ = 6226560.

The previous prime is 20483537. The next prime is 20483557. The reversal of 20483540 is 4538402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 72239 + ... + 72521.

It is an arithmetic number, because the mean of its divisors is an integer number (572544).

Almost surely, 2^20483540 is an apocalyptic number.

20483540 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 20483540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27482112).

20483540 is an abundant number, since it is smaller than the sum of its proper divisors (34480684).

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

20483540 is a wasteful number, since it uses less digits than its factorization.

20483540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 357 (or 355 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 26.

The square root of 20483540 is about 4525.8745011324. The cubic root of 20483540 is about 273.6119144008.

The spelling of 20483540 in words is "twenty million, four hundred eighty-three thousand, five hundred forty".