20431592 has 8 divisors (see below), whose sum is σ = 38309250. Its totient is φ = 10215792.

The previous prime is 20431591. The next prime is 20431627. The reversal of 20431592 is 29513402.

It can be written as a sum of positive squares in only one way, i.e., 17023876 + 3407716 = 4126^2 + 1846^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (20431591) 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, 1276967 + ... + 1276982.

Almost surely, 2^20431592 is an apocalyptic number.

It is an amenable number.

20431592 is a deficient number, since it is larger than the sum of its proper divisors (17877658).

20431592 is a wasteful number, since it uses less digits than its factorization.

20431592 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2553955 (or 2553951 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 20431592 is about 4520.1318564838. The cubic root of 20431592 is about 273.3804175614.

Adding to 20431592 its reverse (29513402), we get a palindrome (49944994).

The spelling of 20431592 in words is "twenty million, four hundred thirty-one thousand, five hundred ninety-two".