20677744 has 40 divisors (see below), whose sum is σ = 42283008. Its totient is φ = 9781440.

The previous prime is 20677739. The next prime is 20677751. The reversal of 20677744 is 44777602.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22869 + ... + 23755.

Almost surely, 2^20677744 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20677744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21141504).

20677744 is an abundant number, since it is smaller than the sum of its proper divisors (21605264).

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

20677744 is a wasteful number, since it uses less digits than its factorization.

20677744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 973 (or 967 counting only the distinct ones).

The product of its (nonzero) digits is 65856, while the sum is 37.

The square root of 20677744 is about 4547.2787466792. The cubic root of 20677744 is about 274.4738988435.

The spelling of 20677744 in words is "twenty million, six hundred seventy-seven thousand, seven hundred forty-four".