20002539534 has 32 divisors (see below), whose sum is σ = 40945496064. Its totient is φ = 6510853440.

The previous prime is 20002539451. The next prime is 20002539563. The reversal of 20002539534 is 43593520002.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20002539495 and 20002539504.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1510707 + ... + 1523889.

It is an arithmetic number, because the mean of its divisors is an integer number (1279546752).

Almost surely, 2^20002539534 is an apocalyptic number.

20002539534 is an abundant number, since it is smaller than the sum of its proper divisors (20942956530).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20002539534 is a wasteful number, since it uses less digits than its factorization.

20002539534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19112.

The product of its (nonzero) digits is 32400, while the sum is 33.

The spelling of 20002539534 in words is "twenty billion, two million, five hundred thirty-nine thousand, five hundred thirty-four".