20431342334 has 32 divisors (see below), whose sum is σ = 34191612000. Its totient is φ = 9091603584.

The previous prime is 20431342331. The next prime is 20431342367. The reversal of 20431342334 is 43324313402.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20431342297 and 20431342306.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20431342331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 515477 + ... + 553695.

It is an arithmetic number, because the mean of its divisors is an integer number (1068487875).

Almost surely, 2^20431342334 is an apocalyptic number.

20431342334 is a deficient number, since it is larger than the sum of its proper divisors (13760269666).

20431342334 is a wasteful number, since it uses less digits than its factorization.

20431342334 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38972.

The product of its (nonzero) digits is 20736, while the sum is 29.

Adding to 20431342334 its reverse (43324313402), we get a palindrome (63755655736).

The spelling of 20431342334 in words is "twenty billion, four hundred thirty-one million, three hundred forty-two thousand, three hundred thirty-four".