20681301 has 16 divisors (see below), whose sum is σ = 28941696. Its totient is φ = 13111296.

The previous prime is 20681251. The next prime is 20681303. The reversal of 20681301 is 10318602.

It is not a de Polignac number, because 20681301 - 2²¹ = 18584149 is a prime.

It is a super-2 number, since 2×20681301² = 855432422105202, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20681303) 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 15 ways as a sum of consecutive naturals, for example, 12541 + ... + 14093.

It is an arithmetic number, because the mean of its divisors is an integer number (1808856).

Almost surely, 2^20681301 is an apocalyptic number.

It is an amenable number.

20681301 is a deficient number, since it is larger than the sum of its proper divisors (8260395).

20681301 is a wasteful number, since it uses less digits than its factorization.

20681301 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1772.

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 20681301 is about 4547.6698428976. The cubic root of 20681301 is about 274.4896363385.

Adding to 20681301 its reverse (10318602), we get a palindrome (30999903).

The spelling of 20681301 in words is "twenty million, six hundred eighty-one thousand, three hundred one".