20155345345 has 8 divisors (see below), whose sum is σ = 24701019264. Its totient is φ = 15781206384.

The previous prime is 20155345321. The next prime is 20155345351. The reversal of 20155345345 is 54354355102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20155345345 - 2¹⁷ = 20155214273 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42883479 + ... + 42883948.

It is an arithmetic number, because the mean of its divisors is an integer number (3087627408).

Almost surely, 2^20155345345 is an apocalyptic number.

It is an amenable number.

20155345345 is a deficient number, since it is larger than the sum of its proper divisors (4545673919).

20155345345 is an equidigital number, since it uses as much as digits as its factorization.

20155345345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85767479.

The product of its (nonzero) digits is 180000, while the sum is 37.

The spelling of 20155345345 in words is "twenty billion, one hundred fifty-five million, three hundred forty-five thousand, three hundred forty-five".