20162171478 has 8 divisors (see below), whose sum is σ = 40324342968. Its totient is φ = 6720723824.

The previous prime is 20162171429. The next prime is 20162171501. The reversal of 20162171478 is 87417126102.

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

20162171478 is an admirable number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1680180951 + ... + 1680180962.

It is an arithmetic number, because the mean of its divisors is an integer number (5040542871).

Almost surely, 2^20162171478 is an apocalyptic number.

20162171478 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.

20162171478 is a wasteful number, since it uses less digits than its factorization.

20162171478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3360361918.

The product of its (nonzero) digits is 37632, while the sum is 39.

The spelling of 20162171478 in words is "twenty billion, one hundred sixty-two million, one hundred seventy-one thousand, four hundred seventy-eight".