20504043633 has 32 divisors (see below), whose sum is σ = 27820403712. Its totient is φ = 13431096000.

The previous prime is 20504043631. The next prime is 20504043671. The reversal of 20504043633 is 33634040502.

It is not a de Polignac number, because 20504043633 - 2¹ = 20504043631 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20504043633.

It is not an unprimeable number, because it can be changed into a prime (20504043631) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 41759518 + ... + 41760008.

It is an arithmetic number, because the mean of its divisors is an integer number (869387616).

Almost surely, 2^20504043633 is an apocalyptic number.

It is an amenable number.

20504043633 is a deficient number, since it is larger than the sum of its proper divisors (7316360079).

20504043633 is a wasteful number, since it uses less digits than its factorization.

20504043633 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1365.

The product of its (nonzero) digits is 25920, while the sum is 30.

The spelling of 20504043633 in words is "twenty billion, five hundred four million, forty-three thousand, six hundred thirty-three".