20431534323151 has 8 divisors (see below), whose sum is σ = 23351898213504. Its totient is φ = 17511563751000.

The previous prime is 20431534323133. The next prime is 20431534323217. The reversal of 20431534323151 is 15132343513402.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20431534323151 - 2³¹ = 20429386839503 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20431534323151.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20431534323131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 98218225 + ... + 98426026.

It is an arithmetic number, because the mean of its divisors is an integer number (2918987276688).

Almost surely, 2^{20431534323151} is an apocalyptic number.

20431534323151 is a deficient number, since it is larger than the sum of its proper divisors (2920363890353).

20431534323151 is a wasteful number, since it uses less digits than its factorization.

20431534323151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196659101.

The product of its (nonzero) digits is 129600, while the sum is 37.

Adding to 20431534323151 its reverse (15132343513402), we get a palindrome (35563877836553).

The spelling of 20431534323151 in words is "twenty trillion, four hundred thirty-one billion, five hundred thirty-four million, three hundred twenty-three thousand, one hundred fifty-one".