20126431456 has 12 divisors (see below), whose sum is σ = 39623911992. Its totient is φ = 10063215712.

The previous prime is 20126431447. The next prime is 20126431471. The reversal of 20126431456 is 65413462102.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 314475460 + ... + 314475523.

It is an arithmetic number, because the mean of its divisors is an integer number (3301992666).

Almost surely, 2^20126431456 is an apocalyptic number.

It is an amenable number.

20126431456 is a deficient number, since it is larger than the sum of its proper divisors (19497480536).

20126431456 is an equidigital number, since it uses as much as digits as its factorization.

20126431456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 628950993 (or 628950985 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 34.

Adding to 20126431456 its reverse (65413462102), we get a palindrome (85539893558).

The spelling of 20126431456 in words is "twenty billion, one hundred twenty-six million, four hundred thirty-one thousand, four hundred fifty-six".