20545005522 has 16 divisors (see below), whose sum is σ = 41131236672. Its totient is φ = 6841464240.

The previous prime is 20545005511. The next prime is 20545005587. The reversal of 20545005522 is 22550054502.

It is a self number, because there is not a number n which added to its sum of digits gives 20545005522.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1711254 + ... + 1723217.

It is an arithmetic number, because the mean of its divisors is an integer number (2570702292).

Almost surely, 2^20545005522 is an apocalyptic number.

20545005522 is an abundant number, since it is smaller than the sum of its proper divisors (20586231150).

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

20545005522 is a wasteful number, since it uses less digits than its factorization.

20545005522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3435473.

The product of its (nonzero) digits is 20000, while the sum is 30.

The spelling of 20545005522 in words is "twenty billion, five hundred forty-five million, five thousand, five hundred twenty-two".