21303143424442 has 16 divisors (see below), whose sum is σ = 35984195345664. Its totient is φ = 9370884204000.

The previous prime is 21303143424403. The next prime is 21303143424461. The reversal of 21303143424442 is 24442434130312.

It is a super-2 number, since 2×21303143424442² (a number of 27 digits) contains 22 as substring.

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, 15618139659 + ... + 15618141022.

It is an arithmetic number, because the mean of its divisors is an integer number (2249012209104).

Almost surely, 2^{21303143424442} is an apocalyptic number.

21303143424442 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21303143424442 is a deficient number, since it is larger than the sum of its proper divisors (14681051921222).

21303143424442 is a wasteful number, since it uses less digits than its factorization.

21303143424442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31236280725.

The product of its (nonzero) digits is 221184, while the sum is 37.

Adding to 21303143424442 its reverse (24442434130312), we get a palindrome (45745577554754).

The spelling of 21303143424442 in words is "twenty-one trillion, three hundred three billion, one hundred forty-three million, four hundred twenty-four thousand, four hundred forty-two".