20342456 has 16 divisors (see below), whose sum is σ = 39457800. Its totient is φ = 9820384.

The previous prime is 20342447. The next prime is 20342461. The reversal of 20342456 is 65424302.

It is a super-2 number, since 2×20342456² = 827631032223872, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 43610 + ... + 44073.

Almost surely, 2^20342456 is an apocalyptic number.

It is an amenable number.

20342456 is a deficient number, since it is larger than the sum of its proper divisors (19115344).

20342456 is a wasteful number, since it uses less digits than its factorization.

20342456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87718 (or 87714 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 26.

The square root of 20342456 is about 4510.2611897760. The cubic root of 20342456 is about 272.9822831512.

Adding to 20342456 its reverse (65424302), we get a palindrome (85766758).

The spelling of 20342456 in words is "twenty million, three hundred forty-two thousand, four hundred fifty-six".