20028523197 has 8 divisors (see below), whose sum is σ = 26759534656. Its totient is φ = 13324930272.

The previous prime is 20028523159. The next prime is 20028523201. The reversal of 20028523197 is 79132582002.

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

It is not a de Polignac number, because 20028523197 - 2¹⁹ = 20027998909 is a prime.

It is a super-2 number, since 2×20028523197² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20028523117) 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, 6852928 + ... + 6855849.

It is an arithmetic number, because the mean of its divisors is an integer number (3344941832).

Almost surely, 2^20028523197 is an apocalyptic number.

It is an amenable number.

20028523197 is a deficient number, since it is larger than the sum of its proper divisors (6731011459).

20028523197 is a wasteful number, since it uses less digits than its factorization.

20028523197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13709267.

The product of its (nonzero) digits is 60480, while the sum is 39.

The spelling of 20028523197 in words is "twenty billion, twenty-eight million, five hundred twenty-three thousand, one hundred ninety-seven".