20466506505 has 32 divisors (see below), whose sum is σ = 33222804480. Its totient is φ = 10756813760.

The previous prime is 20466506503. The next prime is 20466506521. The reversal of 20466506505 is 50560566402.

It is a happy number.

It is not a de Polignac number, because 20466506505 - 2¹ = 20466506503 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20466506503) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4405714 + ... + 4410356.

It is an arithmetic number, because the mean of its divisors is an integer number (1038212640).

Almost surely, 2^20466506505 is an apocalyptic number.

It is an amenable number.

20466506505 is a deficient number, since it is larger than the sum of its proper divisors (12756297975).

20466506505 is a wasteful number, since it uses less digits than its factorization.

20466506505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8861.

The product of its (nonzero) digits is 216000, while the sum is 39.

The spelling of 20466506505 in words is "twenty billion, four hundred sixty-six million, five hundred six thousand, five hundred five".