20053531 has 8 divisors (see below), whose sum is σ = 21150720. Its totient is φ = 18960552.

The previous prime is 20053513. The next prime is 20053541. The reversal of 20053531 is 13535002.

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 20053531 - 2⁷ = 20053403 is a prime.

It is a super-2 number, since 2×20053531² = 804288211135922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20053499 and 20053508.

It is not an unprimeable number, because it can be changed into a prime (20053541) 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, 15786 + ... + 17008.

It is an arithmetic number, because the mean of its divisors is an integer number (2643840).

Almost surely, 2^20053531 is an apocalyptic number.

20053531 is a deficient number, since it is larger than the sum of its proper divisors (1097189).

20053531 is a wasteful number, since it uses less digits than its factorization.

20053531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2105.

The product of its (nonzero) digits is 450, while the sum is 19.

The square root of 20053531 is about 4478.1169033423. The cubic root of 20053531 is about 271.6837217307.

Adding to 20053531 its reverse (13535002), we get a palindrome (33588533).

The spelling of 20053531 in words is "twenty million, fifty-three thousand, five hundred thirty-one".