20731101 has 8 divisors (see below), whose sum is σ = 27991680. Its totient is φ = 13645632.

The previous prime is 20731097. The next prime is 20731121. The reversal of 20731101 is 10113702.

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

It is not a de Polignac number, because 20731101 - 2² = 20731097 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20731121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43500 + ... + 43973.

It is an arithmetic number, because the mean of its divisors is an integer number (3498960).

Almost surely, 2^20731101 is an apocalyptic number.

It is an amenable number.

20731101 is a deficient number, since it is larger than the sum of its proper divisors (7260579).

20731101 is an equidigital number, since it uses as much as digits as its factorization.

20731101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87555.

The product of its (nonzero) digits is 42, while the sum is 15.

The square root of 20731101 is about 4553.1418822611. The cubic root of 20731101 is about 274.7097808796.

Adding to 20731101 its reverse (10113702), we get a palindrome (30844803).

The spelling of 20731101 in words is "twenty million, seven hundred thirty-one thousand, one hundred one".