20431082 has 16 divisors (see below), whose sum is σ = 35085120. Its totient is φ = 8741088.

The previous prime is 20431057. The next prime is 20431087. The reversal of 20431082 is 28013402.

It is a super-2 number, since 2×20431082² = 834858223381448, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20431087) 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, 11894 + ... + 13502.

It is an arithmetic number, because the mean of its divisors is an integer number (2192820).

Almost surely, 2^20431082 is an apocalyptic number.

20431082 is a deficient number, since it is larger than the sum of its proper divisors (14654038).

20431082 is a wasteful number, since it uses less digits than its factorization.

20431082 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2525.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 20431082 is about 4520.0754418483. The cubic root of 20431082 is about 273.3781428949.

Adding to 20431082 its reverse (28013402), we get a palindrome (48444484).

It can be divided in two parts, 2043 and 1082, that added together give a 5-th power (3125 = 5⁵).

The spelling of 20431082 in words is "twenty million, four hundred thirty-one thousand, eighty-two".