21242450510 has 8 divisors (see below), whose sum is σ = 38236410936. Its totient is φ = 8496980200.

The previous prime is 21242450501. The next prime is 21242450549. The reversal of 21242450510 is 1505424212.

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

It is a self number, because there is not a number n which added to its sum of digits gives 21242450510.

It is a congruent number.

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, 1062122516 + ... + 1062122535.

It is an arithmetic number, because the mean of its divisors is an integer number (4779551367).

Almost surely, 2^21242450510 is an apocalyptic number.

21242450510 is a deficient number, since it is larger than the sum of its proper divisors (16993960426).

21242450510 is a wasteful number, since it uses less digits than its factorization.

21242450510 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2124245058.

The product of its (nonzero) digits is 3200, while the sum is 26.

Adding to 21242450510 its reverse (1505424212), we get a palindrome (22747874722).

The spelling of 21242450510 in words is "twenty-one billion, two hundred forty-two million, four hundred fifty thousand, five hundred ten".