20164654770 has 64 divisors (see below), whose sum is σ = 52325771904. Its totient is φ = 4943808000.

The previous prime is 20164654739. The next prime is 20164654793. The reversal of 20164654770 is 7745646102.

It is a super-2 number, since 2×20164654770² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 5107 + ... + 200886.

It is an arithmetic number, because the mean of its divisors is an integer number (817590186).

Almost surely, 2^20164654770 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20164654770, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26162885952).

20164654770 is an abundant number, since it is smaller than the sum of its proper divisors (32161117134).

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

20164654770 is a wasteful number, since it uses less digits than its factorization.

20164654770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206267.

The product of its (nonzero) digits is 282240, while the sum is 42.

The spelling of 20164654770 in words is "twenty billion, one hundred sixty-four million, six hundred fifty-four thousand, seven hundred seventy".