20900088066 has 32 divisors (see below), whose sum is σ = 49107901248. Its totient is φ = 5846178240.

The previous prime is 20900088049. The next prime is 20900088089. The reversal of 20900088066 is 66088000902.

It is a super-3 number, since 3×20900088066³ (a number of 32 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12178681 + ... + 12180396.

It is an arithmetic number, because the mean of its divisors is an integer number (1534621914).

Almost surely, 2^20900088066 is an apocalyptic number.

20900088066 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

20900088066 is an abundant number, since it is smaller than the sum of its proper divisors (28207813182).

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

20900088066 is a wasteful number, since it uses less digits than its factorization.

20900088066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24359106.

The product of its (nonzero) digits is 41472, while the sum is 39.

Adding to 20900088066 its reverse (66088000902), we get a palindrome (86988088968).

The spelling of 20900088066 in words is "twenty billion, nine hundred million, eighty-eight thousand, sixty-six".