20532521534 has 16 divisors (see below), whose sum is σ = 35210979936. Its totient is φ = 8796559200.

The previous prime is 20532521533. The next prime is 20532521591. The reversal of 20532521534 is 43512523502.

It is a self number, because there is not a number n which added to its sum of digits gives 20532521534.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20532521533) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 216257 + ... + 296364.

It is an arithmetic number, because the mean of its divisors is an integer number (2200686246).

Almost surely, 2^20532521534 is an apocalyptic number.

20532521534 is a deficient number, since it is larger than the sum of its proper divisors (14678458402).

20532521534 is a wasteful number, since it uses less digits than its factorization.

20532521534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 515491.

The product of its (nonzero) digits is 36000, while the sum is 32.

The spelling of 20532521534 in words is "twenty billion, five hundred thirty-two million, five hundred twenty-one thousand, five hundred thirty-four".