20341566505 has 32 divisors (see below), whose sum is σ = 27646746624. Its totient is φ = 14255087616.

The previous prime is 20341566499. The next prime is 20341566521. The reversal of 20341566505 is 50566514302.

It is a cyclic number.

It is not a de Polignac number, because 20341566505 - 2¹³ = 20341558313 is a prime.

It is a Duffinian 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, 136297 + ... + 243433.

It is an arithmetic number, because the mean of its divisors is an integer number (863960832).

Almost surely, 2^20341566505 is an apocalyptic number.

It is an amenable number.

20341566505 is a deficient number, since it is larger than the sum of its proper divisors (7305180119).

20341566505 is a wasteful number, since it uses less digits than its factorization.

20341566505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107305.

The product of its (nonzero) digits is 108000, while the sum is 37.

The spelling of 20341566505 in words is "twenty billion, three hundred forty-one million, five hundred sixty-six thousand, five hundred five".