20683031 has 2 divisors, whose sum is σ = 20683032. Its totient is φ = 20683030.

The previous prime is 20683021. The next prime is 20683057. The reversal of 20683031 is 13038602.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20683031 is a prime.

It is a super-2 number, since 2×20683031² = 855575542693922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20682988 and 20683006.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20683021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10341515 + 10341516.

It is an arithmetic number, because the mean of its divisors is an integer number (10341516).

Almost surely, 2^20683031 is an apocalyptic number.

20683031 is a deficient number, since it is larger than the sum of its proper divisors (1).

20683031 is an equidigital number, since it uses as much as digits as its factorization.

20683031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 20683031 is about 4547.8600462195. The cubic root of 20683031 is about 274.4972898517.

The spelling of 20683031 in words is "twenty million, six hundred eighty-three thousand, thirty-one".