20968031 has 6 divisors (see below), whose sum is σ = 24391440. Its totient is φ = 17972556.

The previous prime is 20968007. The next prime is 20968037. The reversal of 20968031 is 13086902.

It is not a de Polignac number, because 20968031 - 2¹⁴ = 20951647 is a prime.

It is a super-2 number, since 2×20968031² = 879316648033922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20967985 and 20968003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20968037) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 213911 + ... + 214008.

It is an arithmetic number, because the mean of its divisors is an integer number (4065240).

Almost surely, 2^20968031 is an apocalyptic number.

20968031 is a deficient number, since it is larger than the sum of its proper divisors (3423409).

20968031 is an equidigital number, since it uses as much as digits as its factorization.

20968031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 427933 (or 427926 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 20968031 is about 4579.0862625637. The cubic root of 20968031 is about 275.7523464611.

The spelling of 20968031 in words is "twenty million, nine hundred sixty-eight thousand, thirty-one".