20534322505 has 16 divisors (see below), whose sum is σ = 24955257600. Its totient is φ = 16219400512.

The previous prime is 20534322499. The next prime is 20534322547. The reversal of 20534322505 is 50522343502.

It is a cyclic number.

It is not a de Polignac number, because 20534322505 - 2⁹ = 20534321993 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41892 + ... + 206938.

It is an arithmetic number, because the mean of its divisors is an integer number (1559703600).

Almost surely, 2^20534322505 is an apocalyptic number.

It is an amenable number.

20534322505 is a deficient number, since it is larger than the sum of its proper divisors (4420935095).

20534322505 is a wasteful number, since it uses less digits than its factorization.

20534322505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165368.

The product of its (nonzero) digits is 36000, while the sum is 31.

The spelling of 20534322505 in words is "twenty billion, five hundred thirty-four million, three hundred twenty-two thousand, five hundred five".