20463340 has 12 divisors (see below), whose sum is σ = 42973056. Its totient is φ = 8185328.

The previous prime is 20463293. The next prime is 20463343. The reversal of 20463340 is 4336402.

It is not an unprimeable number, because it can be changed into a prime (20463343) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 511564 + ... + 511603.

It is an arithmetic number, because the mean of its divisors is an integer number (3581088).

Almost surely, 2^20463340 is an apocalyptic number.

20463340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20463340 is an abundant number, since it is smaller than the sum of its proper divisors (22509716).

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

20463340 is a wasteful number, since it uses less digits than its factorization.

20463340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1023176 (or 1023174 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 22.

The square root of 20463340 is about 4523.6423377628. The cubic root of 20463340 is about 273.5219433235.

Adding to 20463340 its reverse (4336402), we get a palindrome (24799742).

The spelling of 20463340 in words is "twenty million, four hundred sixty-three thousand, three hundred forty".