20672344 has 64 divisors (see below), whose sum is σ = 49685760. Its totient is φ = 7827840.

The previous prime is 20672321. The next prime is 20672371. The reversal of 20672344 is 44327602.

It is a Harshad number since it is a multiple of its sum of digits (28).

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, 22339 + ... + 23245.

It is an arithmetic number, because the mean of its divisors is an integer number (776340).

Almost surely, 2^20672344 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 20672344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24842880).

20672344 is an abundant number, since it is smaller than the sum of its proper divisors (29013416).

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

20672344 is a wasteful number, since it uses less digits than its factorization.

20672344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 968 (or 964 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 28.

The square root of 20672344 is about 4546.6849461998. The cubic root of 20672344 is about 274.4500037787.

Adding to 20672344 its reverse (44327602), we get a palindrome (64999946).

The spelling of 20672344 in words is "twenty million, six hundred seventy-two thousand, three hundred forty-four".