20356541066 has 16 divisors (see below), whose sum is σ = 30987826560. Its totient is φ = 10027478160.

The previous prime is 20356541027. The next prime is 20356541077. The reversal of 20356541066 is 66014565302.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 141680 + ... + 246548.

It is an arithmetic number, because the mean of its divisors is an integer number (1936739160).

Almost surely, 2^20356541066 is an apocalyptic number.

20356541066 is a deficient number, since it is larger than the sum of its proper divisors (10631285494).

20356541066 is a wasteful number, since it uses less digits than its factorization.

20356541066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106309.

The product of its (nonzero) digits is 129600, while the sum is 38.

The spelling of 20356541066 in words is "twenty billion, three hundred fifty-six million, five hundred forty-one thousand, sixty-six".