20205525506 has 64 divisors (see below), whose sum is σ = 32450457600. Its totient is φ = 9423461376.

The previous prime is 20205525499. The next prime is 20205525523. The reversal of 20205525506 is 60552550202.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 46026035 + ... + 46026473.

It is an arithmetic number, because the mean of its divisors is an integer number (507038400).

Almost surely, 2^20205525506 is an apocalyptic number.

20205525506 is a deficient number, since it is larger than the sum of its proper divisors (12244932094).

20205525506 is a wasteful number, since it uses less digits than its factorization.

20205525506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 783.

The product of its (nonzero) digits is 30000, while the sum is 32.

The spelling of 20205525506 in words is "twenty billion, two hundred five million, five hundred twenty-five thousand, five hundred six".