20678650 has 24 divisors (see below), whose sum is σ = 40488480. Its totient is φ = 7835760.

The previous prime is 20678629. The next prime is 20678659. The reversal of 20678650 is 5687602.

It is not an unprimeable number, because it can be changed into a prime (20678659) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9934 + ... + 11833.

It is an arithmetic number, because the mean of its divisors is an integer number (1687020).

Almost surely, 2^20678650 is an apocalyptic number.

20678650 is a deficient number, since it is larger than the sum of its proper divisors (19809830).

20678650 is a wasteful number, since it uses less digits than its factorization.

20678650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21798 (or 21793 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 34.

The square root of 20678650 is about 4547.3783656080. The cubic root of 20678650 is about 274.4779074968.

The spelling of 20678650 in words is "twenty million, six hundred seventy-eight thousand, six hundred fifty".