20463688 has 16 divisors (see below), whose sum is σ = 43850880. Its totient is φ = 8770128.

The previous prime is 20463683. The next prime is 20463739. The reversal of 20463688 is 88636402.

It is a super-2 number, since 2×20463688² = 837525053122688, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20463683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 182656 + ... + 182767.

It is an arithmetic number, because the mean of its divisors is an integer number (2740680).

Almost surely, 2^20463688 is an apocalyptic number.

20463688 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

20463688 is an abundant number, since it is smaller than the sum of its proper divisors (23387192).

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

20463688 is a wasteful number, since it uses less digits than its factorization.

20463688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 365436 (or 365432 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 37.

The square root of 20463688 is about 4523.6808021787. The cubic root of 20463688 is about 273.5234938214.

The spelling of 20463688 in words is "twenty million, four hundred sixty-three thousand, six hundred eighty-eight".