21504642310 has 16 divisors (see below), whose sum is σ = 40043127600. Its totient is φ = 8305241056.

The previous prime is 21504642283. The next prime is 21504642331. The reversal of 21504642310 is 1324640512.

It is a super-2 number, since 2×21504642310² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

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, 37076680 + ... + 37077259.

It is an arithmetic number, because the mean of its divisors is an integer number (2502695475).

Almost surely, 2^21504642310 is an apocalyptic number.

21504642310 is a deficient number, since it is larger than the sum of its proper divisors (18538485290).

21504642310 is a wasteful number, since it uses less digits than its factorization.

21504642310 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74153975.

The product of its (nonzero) digits is 5760, while the sum is 28.

The spelling of 21504642310 in words is "twenty-one billion, five hundred four million, six hundred forty-two thousand, three hundred ten".