20319919445 has 32 divisors (see below), whose sum is σ = 28057731072. Its totient is φ = 13838755392.

The previous prime is 20319919429. The next prime is 20319919447. The reversal of 20319919445 is 54491991302.

20319919445 = 24078² + 24079² + ... + 24112².

It is not a de Polignac number, because 20319919445 - 2⁴ = 20319919429 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20319919445.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20319919447) 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 31 ways as a sum of consecutive naturals, for example, 3610904 + ... + 3616526.

It is an arithmetic number, because the mean of its divisors is an integer number (876804096).

Almost surely, 2^20319919445 is an apocalyptic number.

It is an amenable number.

20319919445 is a deficient number, since it is larger than the sum of its proper divisors (7737811627).

20319919445 is a wasteful number, since it uses less digits than its factorization.

20319919445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6321.

The product of its (nonzero) digits is 349920, while the sum is 47.

The spelling of 20319919445 in words is "twenty billion, three hundred nineteen million, nine hundred nineteen thousand, four hundred forty-five".