20431454752 has 12 divisors (see below), whose sum is σ = 40224426606. Its totient is φ = 10215727360.

The previous prime is 20431454707. The next prime is 20431454759. The reversal of 20431454752 is 25745413402.

It can be written as a sum of positive squares in only one way, i.e., 17605043856 + 2826410896 = 132684^2 + 53164^2 .

It is not an unprimeable number, because it can be changed into a prime (20431454759) 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, 319241449 + ... + 319241512.

Almost surely, 2^20431454752 is an apocalyptic number.

It is an amenable number.

20431454752 is a deficient number, since it is larger than the sum of its proper divisors (19792971854).

20431454752 is an equidigital number, since it uses as much as digits as its factorization.

20431454752 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 638482971 (or 638482963 counting only the distinct ones).

The product of its (nonzero) digits is 134400, while the sum is 37.

The spelling of 20431454752 in words is "twenty billion, four hundred thirty-one million, four hundred fifty-four thousand, seven hundred fifty-two".