20068531 has 8 divisors (see below), whose sum is σ = 22969184. Its totient is φ = 17176320.

The previous prime is 20068513. The next prime is 20068549. The reversal of 20068531 is 13586002.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20068513) and next prime (20068549).

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

It is not a de Polignac number, because 20068531 - 2⁹ = 20068019 is a prime.

It is a super-2 number, since 2×20068531² = 805491872995922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20068496 and 20068505.

It is not an unprimeable number, because it can be changed into a prime (20068511) 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, 4291 + ... + 7651.

It is an arithmetic number, because the mean of its divisors is an integer number (2871148).

Almost surely, 2^20068531 is an apocalyptic number.

20068531 is a deficient number, since it is larger than the sum of its proper divisors (2900653).

20068531 is an equidigital number, since it uses as much as digits as its factorization.

20068531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4221.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 20068531 is about 4479.7914013936. The cubic root of 20068531 is about 271.7514444700.

The spelling of 20068531 in words is "twenty million, sixty-eight thousand, five hundred thirty-one".