20647914 has 64 divisors (see below), whose sum is σ = 49152000. Its totient is φ = 5778864.

The previous prime is 20647883. The next prime is 20647919. The reversal of 20647914 is 41974602.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (20647919) 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, 162519 + ... + 162645.

It is an arithmetic number, because the mean of its divisors is an integer number (768000).

Almost surely, 2^20647914 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20647914, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24576000).

20647914 is an abundant number, since it is smaller than the sum of its proper divisors (28504086).

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

20647914 is a wasteful number, since it uses less digits than its factorization.

20647914 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232 (or 218 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 20647914 is about 4543.9975792247. The cubic root of 20647914 is about 274.3418487075.

The spelling of 20647914 in words is "twenty million, six hundred forty-seven thousand, nine hundred fourteen".