20720441 has 8 divisors (see below), whose sum is σ = 23708160. Its totient is φ = 17739648.

The previous prime is 20720437. The next prime is 20720449. The reversal of 20720441 is 14402702.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20720441 - 2² = 20720437 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20720449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10025 + ... + 11913.

It is an arithmetic number, because the mean of its divisors is an integer number (2963520).

Almost surely, 2^20720441 is an apocalyptic number.

It is an amenable number.

20720441 is a deficient number, since it is larger than the sum of its proper divisors (2987719).

20720441 is a wasteful number, since it uses less digits than its factorization.

20720441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3463.

The product of its (nonzero) digits is 448, while the sum is 20.

The square root of 20720441 is about 4551.9711115076. The cubic root of 20720441 is about 274.6626872506.

The spelling of 20720441 in words is "twenty million, seven hundred twenty thousand, four hundred forty-one".