20343505553215 has 16 divisors (see below), whose sum is σ = 26290162751328. Its totient is φ = 15022842673536.

The previous prime is 20343505553213. The next prime is 20343505553219. The reversal of 20343505553215 is 51235550534302.

It is a cyclic number.

It is not a de Polignac number, because 20343505553215 - 2¹ = 20343505553213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20343505553213) 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, 34910017 + ... + 35487973.

It is an arithmetic number, because the mean of its divisors is an integer number (1643135171958).

Almost surely, 2^{20343505553215} is an apocalyptic number.

20343505553215 is a deficient number, since it is larger than the sum of its proper divisors (5946657198113).

20343505553215 is a wasteful number, since it uses less digits than its factorization.

20343505553215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1119498.

The product of its (nonzero) digits is 1350000, while the sum is 43.

The spelling of 20343505553215 in words is "twenty trillion, three hundred forty-three billion, five hundred five million, five hundred fifty-three thousand, two hundred fifteen".