21302445245442 has 8 divisors (see below), whose sum is σ = 42604890490896. Its totient is φ = 7100815081812.

The previous prime is 21302445245423. The next prime is 21302445245507. The reversal of 21302445245442 is 24454254420312.

It is a sphenic number, since it is the product of 3 distinct primes.

21302445245442 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 21302445245394 and 21302445245403.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1775203770448 + ... + 1775203770459.

It is an arithmetic number, because the mean of its divisors is an integer number (5325611311362).

Almost surely, 2^{21302445245442} is an apocalyptic number.

21302445245442 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21302445245442 is a wasteful number, since it uses less digits than its factorization.

21302445245442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3550407540912.

The product of its (nonzero) digits is 1228800, while the sum is 42.

Adding to 21302445245442 its reverse (24454254420312), we get a palindrome (45756699665754).

The spelling of 21302445245442 in words is "twenty-one trillion, three hundred two billion, four hundred forty-five million, two hundred forty-five thousand, four hundred forty-two".