20365350665 has 32 divisors (see below), whose sum is σ = 27133747200. Its totient is φ = 14548432320.

The previous prime is 20365350661. The next prime is 20365350673. The reversal of 20365350665 is 56605356302.

It is not a de Polignac number, because 20365350665 - 2² = 20365350661 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20365350661) 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, 7264154 + ... + 7266956.

It is an arithmetic number, because the mean of its divisors is an integer number (847929600).

Almost surely, 2^20365350665 is an apocalyptic number.

It is an amenable number.

20365350665 is a deficient number, since it is larger than the sum of its proper divisors (6768396535).

20365350665 is a wasteful number, since it uses less digits than its factorization.

20365350665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5117.

The product of its (nonzero) digits is 486000, while the sum is 41.

The spelling of 20365350665 in words is "twenty billion, three hundred sixty-five million, three hundred fifty thousand, six hundred sixty-five".