20548233197 has 4 divisors (see below), whose sum is σ = 20985429696. Its totient is φ = 20111036700.

The previous prime is 20548233163. The next prime is 20548233203. The reversal of 20548233197 is 79133284502.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20548233197 - 2⁶ = 20548233133 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 (20548233697) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 218598179 + ... + 218598272.

It is an arithmetic number, because the mean of its divisors is an integer number (5246357424).

Almost surely, 2^20548233197 is an apocalyptic number.

It is an amenable number.

20548233197 is a deficient number, since it is larger than the sum of its proper divisors (437196499).

20548233197 is an equidigital number, since it uses as much as digits as its factorization.

20548233197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 437196498.

The product of its (nonzero) digits is 362880, while the sum is 44.

The spelling of 20548233197 in words is "twenty billion, five hundred forty-eight million, two hundred thirty-three thousand, one hundred ninety-seven".