20679744 has 112 divisors (see below), whose sum is σ = 58375296. Its totient is φ = 6451200.

The previous prime is 20679727. The next prime is 20679767. The reversal of 20679744 is 44797602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 291229 + ... + 291299.

It is an arithmetic number, because the mean of its divisors is an integer number (521208).

Almost surely, 2^20679744 is an apocalyptic number.

20679744 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20679744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29187648).

20679744 is an abundant number, since it is smaller than the sum of its proper divisors (37695552).

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

20679744 is a wasteful number, since it uses less digits than its factorization.

20679744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164 (or 154 counting only the distinct ones).

The product of its (nonzero) digits is 84672, while the sum is 39.

The square root of 20679744 is about 4547.4986531059. The cubic root of 20679744 is about 274.4827478117.

It can be divided in two parts, 2067 and 9744, that added together give a palindrome (11811).

The spelling of 20679744 in words is "twenty million, six hundred seventy-nine thousand, seven hundred forty-four".