20944831 has 2 divisors, whose sum is σ = 20944832. Its totient is φ = 20944830.

The previous prime is 20944817. The next prime is 20944837. The reversal of 20944831 is 13844902.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20944831 - 2¹¹ = 20942783 is a prime.

It is a super-2 number, since 2×20944831² = 877371891237122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20944793 and 20944802.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20944837) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10472415 + 10472416.

It is an arithmetic number, because the mean of its divisors is an integer number (10472416).

Almost surely, 2^20944831 is an apocalyptic number.

20944831 is a deficient number, since it is larger than the sum of its proper divisors (1).

20944831 is an equidigital number, since it uses as much as digits as its factorization.

20944831 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 20944831 is about 4576.5523049562. The cubic root of 20944831 is about 275.6506072091.

The spelling of 20944831 in words is "twenty million, nine hundred forty-four thousand, eight hundred thirty-one".