20344331011431 has 16 divisors (see below), whose sum is σ = 31014706593024. Its totient is φ = 11620149040704.

The previous prime is 20344331011427. The next prime is 20344331011439. The reversal of 20344331011431 is 13411013344302.

It is not a de Polignac number, because 20344331011431 - 2² = 20344331011427 is a prime.

It is a super-2 number, since 2×20344331011431² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20344331011439) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 215908686 + ... + 216002891.

It is an arithmetic number, because the mean of its divisors is an integer number (1938419162064).

Almost surely, 2^{20344331011431} is an apocalyptic number.

20344331011431 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

20344331011431 is a deficient number, since it is larger than the sum of its proper divisors (10670375581593).

20344331011431 is a wasteful number, since it uses less digits than its factorization.

20344331011431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 431913830.

The product of its (nonzero) digits is 10368, while the sum is 30.

Adding to 20344331011431 its reverse (13411013344302), we get a palindrome (33755344355733).

The spelling of 20344331011431 in words is "twenty trillion, three hundred forty-four billion, three hundred thirty-one million, eleven thousand, four hundred thirty-one".