20738538066 has 8 divisors (see below), whose sum is σ = 41477076144. Its totient is φ = 6912846020.

The previous prime is 20738538061. The next prime is 20738538071. The reversal of 20738538066 is 66083583702.

It is an interprime number because it is at equal distance from previous prime (20738538061) and next prime (20738538071).

It is a sphenic number, since it is the product of 3 distinct primes.

20738538066 is an admirable number.

It is a super-2 number, since 2×20738538066² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20738538061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1728211500 + ... + 1728211511.

It is an arithmetic number, because the mean of its divisors is an integer number (5184634518).

Almost surely, 2^20738538066 is an apocalyptic number.

20738538066 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20738538066 is a wasteful number, since it uses less digits than its factorization.

20738538066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3456423016.

The product of its (nonzero) digits is 1451520, while the sum is 48.

The spelling of 20738538066 in words is "twenty billion, seven hundred thirty-eight million, five hundred thirty-eight thousand, sixty-six".