20532264643 has 4 divisors (see below), whose sum is σ = 22398834168. Its totient is φ = 18665695120.

The previous prime is 20532264593. The next prime is 20532264653. The reversal of 20532264643 is 34646223502.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20532264643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20532264653) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 933284746 + ... + 933284767.

It is an arithmetic number, because the mean of its divisors is an integer number (5599708542).

Almost surely, 2^20532264643 is an apocalyptic number.

20532264643 is a deficient number, since it is larger than the sum of its proper divisors (1866569525).

20532264643 is a wasteful number, since it uses less digits than its factorization.

20532264643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1866569524.

The product of its (nonzero) digits is 207360, while the sum is 37.

The spelling of 20532264643 in words is "twenty billion, five hundred thirty-two million, two hundred sixty-four thousand, six hundred forty-three".