20431022 has 16 divisors (see below), whose sum is σ = 31957200. Its totient is φ = 9784320.

The previous prime is 20431009. The next prime is 20431027. The reversal of 20431022 is 22013402.

It is a junction number, because it is equal to n+sod(n) for n = 20430988 and 20431006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20431027) 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 in 7 ways as a sum of consecutive naturals, for example, 6254 + ... + 8942.

It is an arithmetic number, because the mean of its divisors is an integer number (1997325).

Almost surely, 2^20431022 is an apocalyptic number.

20431022 is a deficient number, since it is larger than the sum of its proper divisors (11526178).

20431022 is a wasteful number, since it uses less digits than its factorization.

20431022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2851.

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 20431022 is about 4520.0688047861. The cubic root of 20431022 is about 273.3778752846.

Adding to 20431022 its reverse (22013402), we get a palindrome (42444424).

It can be divided in two parts, 2043 and 1022, that multiplied together give a triangular number (2087946 = T₂₀₄₃).

The spelling of 20431022 in words is "twenty million, four hundred thirty-one thousand, twenty-two".