21040351510 has 8 divisors (see below), whose sum is σ = 37872632736. Its totient is φ = 8416140600.

The previous prime is 21040351487. The next prime is 21040351531. The reversal of 21040351510 is 1515304012.

It is a happy number.

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

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, 1052017566 + ... + 1052017585.

It is an arithmetic number, because the mean of its divisors is an integer number (4734079092).

Almost surely, 2^21040351510 is an apocalyptic number.

21040351510 is a deficient number, since it is larger than the sum of its proper divisors (16832281226).

21040351510 is a wasteful number, since it uses less digits than its factorization.

21040351510 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2104035158.

The product of its (nonzero) digits is 600, while the sum is 22.

Adding to 21040351510 its reverse (1515304012), we get a palindrome (22555655522).

The spelling of 21040351510 in words is "twenty-one billion, forty million, three hundred fifty-one thousand, five hundred ten".