20020405164 has 24 divisors (see below), whose sum is σ = 49462177968. Its totient is φ = 6280911360.

The previous prime is 20020405103. The next prime is 20020405189. The reversal of 20020405164 is 46150402002.

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 7 ways as a sum of consecutive naturals, for example, 49069417 + ... + 49069824.

It is an arithmetic number, because the mean of its divisors is an integer number (2060924082).

Almost surely, 2^20020405164 is an apocalyptic number.

It is an amenable number.

20020405164 is an abundant number, since it is smaller than the sum of its proper divisors (29441772804).

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

20020405164 is a wasteful number, since it uses less digits than its factorization.

20020405164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98139265 (or 98139263 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

Adding to 20020405164 its reverse (46150402002), we get a palindrome (66170807166).

The spelling of 20020405164 in words is "twenty billion, twenty million, four hundred five thousand, one hundred sixty-four".