20463380 has 96 divisors (see below), whose sum is σ = 53088000. Its totient is φ = 6604416.

The previous prime is 20463371. The next prime is 20463389. The reversal of 20463380 is 8336402.

It is an interprime number because it is at equal distance from previous prime (20463371) and next prime (20463389).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20463389) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 130262 + ... + 130418.

It is an arithmetic number, because the mean of its divisors is an integer number (553000).

Almost surely, 2^20463380 is an apocalyptic number.

20463380 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 20463380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26544000).

20463380 is an abundant number, since it is smaller than the sum of its proper divisors (32624620).

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

20463380 is a wasteful number, since it uses less digits than its factorization.

20463380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206 (or 190 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 20463380 is about 4523.6467589767. The cubic root of 20463380 is about 273.5221215425.

Adding to 20463380 its reverse (8336402), we get a palindrome (28799782).

The spelling of 20463380 in words is "twenty million, four hundred sixty-three thousand, three hundred eighty".