21510482042 has 8 divisors (see below), whose sum is σ = 36875112096. Its totient is φ = 9218778012.

The previous prime is 21510482039. The next prime is 21510482047. The reversal of 21510482042 is 24028401512.

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

It is a junction number, because it is equal to n+sod(n) for n = 21510481996 and 21510482014.

It is not an unprimeable number, because it can be changed into a prime (21510482047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 768231488 + ... + 768231515.

It is an arithmetic number, because the mean of its divisors is an integer number (4609389012).

Almost surely, 2^21510482042 is an apocalyptic number.

21510482042 is a deficient number, since it is larger than the sum of its proper divisors (15364630054).

21510482042 is a wasteful number, since it uses less digits than its factorization.

21510482042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1536463012.

The product of its (nonzero) digits is 5120, while the sum is 29.

Adding to 21510482042 its reverse (24028401512), we get a palindrome (45538883554).

The spelling of 21510482042 in words is "twenty-one billion, five hundred ten million, four hundred eighty-two thousand, forty-two".