20345153505 has 16 divisors (see below), whose sum is σ = 32759588544. Its totient is φ = 10781634240.

The previous prime is 20345153501. The next prime is 20345153519. The reversal of 20345153505 is 50535154302.

It is a happy number.

It is not a de Polignac number, because 20345153505 - 2² = 20345153501 is a prime.

It is a super-3 number, since 3×20345153505³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (20345153501) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 4317211 + ... + 4321920.

It is an arithmetic number, because the mean of its divisors is an integer number (2047474284).

Almost surely, 2^20345153505 is an apocalyptic number.

It is an amenable number.

20345153505 is a deficient number, since it is larger than the sum of its proper divisors (12414435039).

20345153505 is a wasteful number, since it uses less digits than its factorization.

20345153505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8639296.

The product of its (nonzero) digits is 45000, while the sum is 33.

The spelling of 20345153505 in words is "twenty billion, three hundred forty-five million, one hundred fifty-three thousand, five hundred five".