20153105545 has 8 divisors (see below), whose sum is σ = 24188658696. Its totient is φ = 16119196416.

The previous prime is 20153105537. The next prime is 20153105561. The reversal of 20153105545 is 54550135102.

It can be written as a sum of positive squares in 4 ways, for example, as 1376706816 + 18776398729 = 37104^2 + 137027^2 .

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 20153105545 - 2³ = 20153105537 is a prime.

It is a super-2 number, since 2×20153105545² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

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 7 ways as a sum of consecutive naturals, for example, 383872 + ... + 433201.

It is an arithmetic number, because the mean of its divisors is an integer number (3023582337).

Almost surely, 2^20153105545 is an apocalyptic number.

It is an amenable number.

20153105545 is a deficient number, since it is larger than the sum of its proper divisors (4035553151).

20153105545 is an equidigital number, since it uses as much as digits as its factorization.

20153105545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 822011.

The product of its (nonzero) digits is 15000, while the sum is 31.

The spelling of 20153105545 in words is "twenty billion, one hundred fifty-three million, one hundred five thousand, five hundred forty-five".