20398696445 has 8 divisors (see below), whose sum is σ = 24940293336. Its totient is φ = 16011052096.

The previous prime is 20398696379. The next prime is 20398696453. The reversal of 20398696445 is 54469689302.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 273869401 + 20124827044 = 16549^2 + 141862^2 .

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 20398696445 - 2¹⁴ = 20398680061 is a prime.

It is a super-2 number, since 2×20398696445² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38487842 + ... + 38488371.

It is an arithmetic number, because the mean of its divisors is an integer number (3117536667).

Almost surely, 2^20398696445 is an apocalyptic number.

It is an amenable number.

20398696445 is a deficient number, since it is larger than the sum of its proper divisors (4541596891).

20398696445 is an equidigital number, since it uses as much as digits as its factorization.

20398696445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76976271.

The product of its (nonzero) digits is 11197440, while the sum is 56.

The spelling of 20398696445 in words is "twenty billion, three hundred ninety-eight million, six hundred ninety-six thousand, four hundred forty-five".