20145432511 has 4 divisors (see below), whose sum is σ = 20146253800. Its totient is φ = 20144611224.

The previous prime is 20145432493. The next prime is 20145432521. The reversal of 20145432511 is 11523454102.

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

It is a cyclic number.

It is not a de Polignac number, because 20145432511 - 2¹⁷ = 20145301439 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20145432511.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20145432521) 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, 372681 + ... + 423298.

It is an arithmetic number, because the mean of its divisors is an integer number (5036563450).

Almost surely, 2^20145432511 is an apocalyptic number.

20145432511 is a deficient number, since it is larger than the sum of its proper divisors (821289).

20145432511 is an equidigital number, since it uses as much as digits as its factorization.

20145432511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 821288.

The product of its (nonzero) digits is 4800, while the sum is 28.

Adding to 20145432511 its reverse (11523454102), we get a palindrome (31668886613).

The spelling of 20145432511 in words is "twenty billion, one hundred forty-five million, four hundred thirty-two thousand, five hundred eleven".