20677844 has 24 divisors (see below), whose sum is σ = 40225248. Its totient is φ = 9220640.

The previous prime is 20677823. The next prime is 20677859. The reversal of 20677844 is 44877602.

It is a junction number, because it is equal to n+sod(n) for n = 20677798 and 20677807.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2102 + ... + 6765.

It is an arithmetic number, because the mean of its divisors is an integer number (1676052).

Almost surely, 2^20677844 is an apocalyptic number.

It is an amenable number.

20677844 is a deficient number, since it is larger than the sum of its proper divisors (19547404).

20677844 is a wasteful number, since it uses less digits than its factorization.

20677844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8935 (or 8933 counting only the distinct ones).

The product of its (nonzero) digits is 75264, while the sum is 38.

The square root of 20677844 is about 4547.2897422531. The cubic root of 20677844 is about 274.4743413054.

The spelling of 20677844 in words is "twenty million, six hundred seventy-seven thousand, eight hundred forty-four".