20444155713431 has 2 divisors, whose sum is σ = 20444155713432. Its totient is φ = 20444155713430.

The previous prime is 20444155713403. The next prime is 20444155713463. The reversal of 20444155713431 is 13431755144402.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20444155713431 is a prime.

It is a super-2 number, since 2×20444155713431² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20444155710431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10222077856715 + 10222077856716.

It is an arithmetic number, because the mean of its divisors is an integer number (10222077856716).

Almost surely, 2^{20444155713431} is an apocalyptic number.

20444155713431 is a deficient number, since it is larger than the sum of its proper divisors (1).

20444155713431 is an equidigital number, since it uses as much as digits as its factorization.

20444155713431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 806400, while the sum is 44.

The spelling of 20444155713431 in words is "twenty trillion, four hundred forty-four billion, one hundred fifty-five million, seven hundred thirteen thousand, four hundred thirty-one".