20145375211503 has 32 divisors (see below), whose sum is σ = 28076008660992. Its totient is φ = 12824489145600.

The previous prime is 20145375211421. The next prime is 20145375211517. The reversal of 20145375211503 is 30511257354102.

It is not a de Polignac number, because 20145375211503 - 2¹⁷ = 20145375080431 is a prime.

It is a super-2 number, since 2×20145375211503² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20145375211553) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 261620338 + ... + 261697328.

It is an arithmetic number, because the mean of its divisors is an integer number (877375270656).

Almost surely, 2^{20145375211503} is an apocalyptic number.

20145375211503 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

20145375211503 is a deficient number, since it is larger than the sum of its proper divisors (7930633449489).

20145375211503 is a wasteful number, since it uses less digits than its factorization.

20145375211503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83415.

The product of its (nonzero) digits is 126000, while the sum is 39.

The spelling of 20145375211503 in words is "twenty trillion, one hundred forty-five billion, three hundred seventy-five million, two hundred eleven thousand, five hundred three".