20731053 has 8 divisors (see below), whose sum is σ = 31590208. Its totient is φ = 11846304.

The previous prime is 20731049. The next prime is 20731057. The reversal of 20731053 is 35013702.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20731049) and next prime (20731057).

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

It is not a de Polignac number, because 20731053 - 2² = 20731049 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 987193 = 20731053 / (2 + 0 + 7 + 3 + 1 + 0 + 5 + 3).

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20731057) 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, 493576 + ... + 493617.

It is an arithmetic number, because the mean of its divisors is an integer number (3948776).

Almost surely, 2^20731053 is an apocalyptic number.

It is an amenable number.

20731053 is a deficient number, since it is larger than the sum of its proper divisors (10859155).

20731053 is an equidigital number, since it uses as much as digits as its factorization.

20731053 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 987203.

The product of its (nonzero) digits is 630, while the sum is 21.

The square root of 20731053 is about 4553.1366111726. The cubic root of 20731053 is about 274.7095688619.

Adding to 20731053 its reverse (35013702), we get a palindrome (55744755).

The spelling of 20731053 in words is "twenty million, seven hundred thirty-one thousand, fifty-three".