20543413135 has 16 divisors (see below), whose sum is σ = 28188735552. Its totient is φ = 14079456000.

The previous prime is 20543413133. The next prime is 20543413213. The reversal of 20543413135 is 53131434502.

It is not a de Polignac number, because 20543413135 - 2¹ = 20543413133 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20543413097 and 20543413106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20543413133) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 87846 + ... + 220915.

It is an arithmetic number, because the mean of its divisors is an integer number (1761795972).

Almost surely, 2^20543413135 is an apocalyptic number.

20543413135 is a deficient number, since it is larger than the sum of its proper divisors (7645322417).

20543413135 is a wasteful number, since it uses less digits than its factorization.

20543413135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 310674.

The product of its (nonzero) digits is 21600, while the sum is 31.

Adding to 20543413135 its reverse (53131434502), we get a palindrome (73674847637).

The spelling of 20543413135 in words is "twenty billion, five hundred forty-three million, four hundred thirteen thousand, one hundred thirty-five".