20193280 has 112 divisors (see below), whose sum is σ = 53080920. Its totient is φ = 7340032.

The previous prime is 20193247. The next prime is 20193293. The reversal of 20193280 is 8239102.

It can be written as a sum of positive squares in 4 ways, for example, as 18386944 + 1806336 = 4288^2 + 1344^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 696306 + ... + 696334.

Almost surely, 2^20193280 is an apocalyptic number.

20193280 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 20193280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26540460).

20193280 is an abundant number, since it is smaller than the sum of its proper divisors (32887640).

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

20193280 is an equidigital number, since it uses as much as digits as its factorization.

20193280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77 (or 53 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 20193280 is about 4493.6933584747. The cubic root of 20193280 is about 272.3133643324.

The spelling of 20193280 in words is "twenty million, one hundred ninety-three thousand, two hundred eighty".