20530644434 has 32 divisors (see below), whose sum is σ = 32375635200. Its totient is φ = 9752859648.

The previous prime is 20530644391. The next prime is 20530644461. The reversal of 20530644434 is 43444603502.

It is a junction number, because it is equal to n+sod(n) for n = 20530644394 and 20530644403.

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, 1555049 + ... + 1568195.

It is an arithmetic number, because the mean of its divisors is an integer number (1011738600).

Almost surely, 2^20530644434 is an apocalyptic number.

20530644434 is a deficient number, since it is larger than the sum of its proper divisors (11844990766).

20530644434 is a wasteful number, since it uses less digits than its factorization.

20530644434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13682.

The product of its (nonzero) digits is 138240, while the sum is 35.

The spelling of 20530644434 in words is "twenty billion, five hundred thirty million, six hundred forty-four thousand, four hundred thirty-four".