20687468 has 12 divisors (see below), whose sum is σ = 36335712. Its totient is φ = 10305840.

The previous prime is 20687467. The next prime is 20687489. The reversal of 20687468 is 86478602.

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (20687461) 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, 8228 + ... + 10443.

It is an arithmetic number, because the mean of its divisors is an integer number (3027976).

Almost surely, 2^20687468 is an apocalyptic number.

It is an amenable number.

20687468 is a deficient number, since it is larger than the sum of its proper divisors (15648244).

20687468 is a wasteful number, since it uses less digits than its factorization.

20687468 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18952 (or 18950 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 41.

The square root of 20687468 is about 4548.3478319056. The cubic root of 20687468 is about 274.5169171716.

The spelling of 20687468 in words is "twenty million, six hundred eighty-seven thousand, four hundred sixty-eight".