20442336481 has 4 divisors (see below), whose sum is σ = 23362670272. Its totient is φ = 17522002692.

The previous prime is 20442336457. The next prime is 20442336503. The reversal of 20442336481 is 18463324402.

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 20442336481 - 2⁵ = 20442336449 is a prime.

It is a super-2 number, since 2×20442336481² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20442336481.

It is not an unprimeable number, because it can be changed into a prime (20442336781) 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, 1460166885 + ... + 1460166898.

It is an arithmetic number, because the mean of its divisors is an integer number (5840667568).

Almost surely, 2^20442336481 is an apocalyptic number.

It is an amenable number.

20442336481 is a deficient number, since it is larger than the sum of its proper divisors (2920333791).

20442336481 is an equidigital number, since it uses as much as digits as its factorization.

20442336481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2920333790.

The product of its (nonzero) digits is 110592, while the sum is 37.

The spelling of 20442336481 in words is "twenty billion, four hundred forty-two million, three hundred thirty-six thousand, four hundred eighty-one".