20197315433 has 4 divisors (see below), whose sum is σ = 20272398660. Its totient is φ = 20122232208.

The previous prime is 20197315421. The next prime is 20197315451. The reversal of 20197315433 is 33451379102.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 33451379102 = 2 ⋅16725689551.

It can be written as a sum of positive squares in 2 ways, for example, as 2571301264 + 17626014169 = 50708^2 + 132763^2 .

It is a cyclic number.

It is not a de Polignac number, because 20197315433 - 2¹⁰ = 20197314409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20197315403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37541210 + ... + 37541747.

It is an arithmetic number, because the mean of its divisors is an integer number (5068099665).

Almost surely, 2^20197315433 is an apocalyptic number.

It is an amenable number.

20197315433 is a deficient number, since it is larger than the sum of its proper divisors (75083227).

20197315433 is an equidigital number, since it uses as much as digits as its factorization.

20197315433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75083226.

The product of its (nonzero) digits is 68040, while the sum is 38.

The spelling of 20197315433 in words is "twenty billion, one hundred ninety-seven million, three hundred fifteen thousand, four hundred thirty-three".