20983031 has 2 divisors, whose sum is σ = 20983032. Its totient is φ = 20983030.

The previous prime is 20983007. The next prime is 20983043. The reversal of 20983031 is 13038902.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20983031 - 2²² = 16788727 is a prime.

It is a super-2 number, since 2×20983031² = 880575179893922, which contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20983051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10491515 + 10491516.

It is an arithmetic number, because the mean of its divisors is an integer number (10491516).

Almost surely, 2^20983031 is an apocalyptic number.

20983031 is a deficient number, since it is larger than the sum of its proper divisors (1).

20983031 is an equidigital number, since it uses as much as digits as its factorization.

20983031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 20983031 is about 4580.7238510960. The cubic root of 20983031 is about 275.8180862097.

The spelling of 20983031 in words is "twenty million, nine hundred eighty-three thousand, thirty-one".