20344423220145 has 48 divisors (see below), whose sum is σ = 35280333691200. Its totient is φ = 10845232092288.

The previous prime is 20344423220137. The next prime is 20344423220153. The reversal of 20344423220145 is 54102232444302.

20344423220145 is a `hidden beast` number, since 2 + 0 + 3 + 4 + 4 + 423 + 220 + 1 + 4 + 5 = 666.

It is an interprime number because it is at equal distance from previous prime (20344423220137) and next prime (20344423220153).

It is not a de Polignac number, because 20344423220145 - 2³ = 20344423220137 is a prime.

It is a super-2 number, since 2×20344423220145² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 1667159614 + ... + 1667171816.

It is an arithmetic number, because the mean of its divisors is an integer number (735006951900).

Almost surely, 2^{20344423220145} is an apocalyptic number.

It is an amenable number.

20344423220145 is a deficient number, since it is larger than the sum of its proper divisors (14935910471055).

20344423220145 is a wasteful number, since it uses less digits than its factorization.

20344423220145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26686 (or 26683 counting only the distinct ones).

The product of its (nonzero) digits is 184320, while the sum is 36.

Adding to 20344423220145 its reverse (54102232444302), we get a palindrome (74446655664447).

The spelling of 20344423220145 in words is "twenty trillion, three hundred forty-four billion, four hundred twenty-three million, two hundred twenty thousand, one hundred forty-five".