21289051510 has 16 divisors (see below), whose sum is σ = 38322043776. Its totient is φ = 8515231488.

The previous prime is 21289051457. The next prime is 21289051517. The reversal of 21289051510 is 1515098212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21289051517) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 300454 + ... + 364486.

It is an arithmetic number, because the mean of its divisors is an integer number (2395127736).

Almost surely, 2^21289051510 is an apocalyptic number.

21289051510 is a deficient number, since it is larger than the sum of its proper divisors (17032992266).

21289051510 is a wasteful number, since it uses less digits than its factorization.

21289051510 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97287.

The product of its (nonzero) digits is 7200, while the sum is 34.

The spelling of 21289051510 in words is "twenty-one billion, two hundred eighty-nine million, fifty-one thousand, five hundred ten".