20608031 has 2 divisors, whose sum is σ = 20608032. Its totient is φ = 20608030.

The previous prime is 20607991. The next prime is 20608037. The reversal of 20608031 is 13080602.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20608031 - 2¹⁰ = 20607007 is a prime.

It is a super-2 number, since 2×20608031² = 849381883393922, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 20607994 and 20608012.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20608037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10304015 + 10304016.

It is an arithmetic number, because the mean of its divisors is an integer number (10304016).

Almost surely, 2^20608031 is an apocalyptic number.

20608031 is a deficient number, since it is larger than the sum of its proper divisors (1).

20608031 is an equidigital number, since it uses as much as digits as its factorization.

20608031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 20608031 is about 4539.6069213094. The cubic root of 20608031 is about 274.1650975460.

Adding to 20608031 its reverse (13080602), we get a palindrome (33688633).

The spelling of 20608031 in words is "twenty million, six hundred eight thousand, thirty-one".