20162171479 has 8 divisors (see below), whose sum is σ = 21399139440. Its totient is φ = 18930865536.

The previous prime is 20162171429. The next prime is 20162171501. The reversal of 20162171479 is 97417126102.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20162171479 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20162171429) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1408164 + ... + 1422409.

It is an arithmetic number, because the mean of its divisors is an integer number (2674892430).

Almost surely, 2^20162171479 is an apocalyptic number.

20162171479 is a deficient number, since it is larger than the sum of its proper divisors (1236967961).

20162171479 is a wasteful number, since it uses less digits than its factorization.

20162171479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2831009.

The product of its (nonzero) digits is 42336, while the sum is 40.

The spelling of 20162171479 in words is "twenty billion, one hundred sixty-two million, one hundred seventy-one thousand, four hundred seventy-nine".