20154430053145 has 4 divisors (see below), whose sum is σ = 24185316063780. Its totient is φ = 16123544042512.

The previous prime is 20154430053143. The next prime is 20154430053209. The reversal of 20154430053145 is 54135003445102.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6656234881024 + 13498195172121 = 2579968^2 + 3673989^2 .

It is a cyclic number.

It is not a de Polignac number, because 20154430053145 - 2¹ = 20154430053143 is a prime.

It is a super-2 number, since 2×20154430053145² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20154430053143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2015443005310 + ... + 2015443005319.

It is an arithmetic number, because the mean of its divisors is an integer number (6046329015945).

Almost surely, 2^{20154430053145} is an apocalyptic number.

It is an amenable number.

20154430053145 is a deficient number, since it is larger than the sum of its proper divisors (4030886010635).

20154430053145 is an equidigital number, since it uses as much as digits as its factorization.

20154430053145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4030886010634.

The product of its (nonzero) digits is 144000, while the sum is 37.

Adding to 20154430053145 its reverse (54135003445102), we get a palindrome (74289433498247).

The spelling of 20154430053145 in words is "twenty trillion, one hundred fifty-four billion, four hundred thirty million, fifty-three thousand, one hundred forty-five".