20156471573 has 8 divisors (see below), whose sum is σ = 23251257792. Its totient is φ = 17115507936.

The previous prime is 20156471557. The next prime is 20156471581. The reversal of 20156471573 is 37517465102.

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

It is a cyclic number.

It is not a de Polignac number, because 20156471573 - 2⁴ = 20156471557 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 20156471573.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20156471173) by changing a digit.

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, 13454840 + ... + 13456337.

It is an arithmetic number, because the mean of its divisors is an integer number (2906407224).

Almost surely, 2^20156471573 is an apocalyptic number.

It is an amenable number.

20156471573 is a deficient number, since it is larger than the sum of its proper divisors (3094786219).

20156471573 is a wasteful number, since it uses less digits than its factorization.

20156471573 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26911291.

The product of its (nonzero) digits is 176400, while the sum is 41.

The spelling of 20156471573 in words is "twenty billion, one hundred fifty-six million, four hundred seventy-one thousand, five hundred seventy-three".