20853031 has 2 divisors, whose sum is σ = 20853032. Its totient is φ = 20853030.

The previous prime is 20853023. The next prime is 20853037. The reversal of 20853031 is 13035802.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20853031 - 2³ = 20853023 is a prime.

It is a super-2 number, since 2×20853031² = 869697803773922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20852993 and 20853011.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20853037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10426515 + 10426516.

It is an arithmetic number, because the mean of its divisors is an integer number (10426516).

Almost surely, 2^20853031 is an apocalyptic number.

20853031 is a deficient number, since it is larger than the sum of its proper divisors (1).

20853031 is an equidigital number, since it uses as much as digits as its factorization.

20853031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 20853031 is about 4566.5119073534. The cubic root of 20853031 is about 275.2472971076.

Adding to 20853031 its reverse (13035802), we get a palindrome (33888833).

The spelling of 20853031 in words is "twenty million, eight hundred fifty-three thousand, thirty-one".