20463320 has 16 divisors (see below), whose sum is σ = 46042560. Its totient is φ = 8185312.

The previous prime is 20463293. The next prime is 20463343. The reversal of 20463320 is 2336402.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 20463292 and 20463301.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 255752 + ... + 255831.

It is an arithmetic number, because the mean of its divisors is an integer number (2877660).

Almost surely, 2^20463320 is an apocalyptic number.

20463320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20463320 is an abundant number, since it is smaller than the sum of its proper divisors (25579240).

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

20463320 is a wasteful number, since it uses less digits than its factorization.

20463320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 511594 (or 511590 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 20.

The square root of 20463320 is about 4523.6401271542. The cubic root of 20463320 is about 273.5218542139.

Adding to 20463320 its reverse (2336402), we get a palindrome (22799722).

The spelling of 20463320 in words is "twenty million, four hundred sixty-three thousand, three hundred twenty".