20522555450 has 24 divisors (see below), whose sum is σ = 38177660640. Its totient is φ = 8207794800.

The previous prime is 20522555441. The next prime is 20522555461. The reversal of 20522555450 is 5455522502.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 20522555450.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 355085 + ... + 408815.

It is an arithmetic number, because the mean of its divisors is an integer number (1590735860).

Almost surely, 2^20522555450 is an apocalyptic number.

20522555450 is a deficient number, since it is larger than the sum of its proper divisors (17655105190).

20522555450 is a wasteful number, since it uses less digits than its factorization.

20522555450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61382 (or 61377 counting only the distinct ones).

The product of its (nonzero) digits is 100000, while the sum is 35.

The spelling of 20522555450 in words is "twenty billion, five hundred twenty-two million, five hundred fifty-five thousand, four hundred fifty".