20319421481 has 4 divisors (see below), whose sum is σ = 20564233872. Its totient is φ = 20074609092.

The previous prime is 20319421471. The next prime is 20319421501. The reversal of 20319421481 is 18412491302.

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, and also an emirpimes, since its reverse is a distinct semiprime: 18412491302 = 2 ⋅9206245651.

It is a cyclic number.

It is not a de Polignac number, because 20319421481 - 2¹⁴ = 20319405097 is a prime.

It is a super-3 number, since 3×20319421481³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20319421471) 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, 122406071 + ... + 122406236.

It is an arithmetic number, because the mean of its divisors is an integer number (5141058468).

Almost surely, 2^20319421481 is an apocalyptic number.

It is an amenable number.

20319421481 is a deficient number, since it is larger than the sum of its proper divisors (244812391).

20319421481 is an equidigital number, since it uses as much as digits as its factorization.

20319421481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244812390.

The product of its (nonzero) digits is 13824, while the sum is 35.

The spelling of 20319421481 in words is "twenty billion, three hundred nineteen million, four hundred twenty-one thousand, four hundred eighty-one".