21481654210 has 64 divisors (see below), whose sum is σ = 39612063744. Its totient is φ = 8385664000.

The previous prime is 21481654199. The next prime is 21481654217. The reversal of 21481654210 is 1245618412.

It is a super-2 number, since 2×21481654210² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21481654217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 53570010 + ... + 53570410.

It is an arithmetic number, because the mean of its divisors is an integer number (618938496).

Almost surely, 2^21481654210 is an apocalyptic number.

21481654210 is a deficient number, since it is larger than the sum of its proper divisors (18130409534).

21481654210 is a wasteful number, since it uses less digits than its factorization.

21481654210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1059.

The product of its (nonzero) digits is 15360, while the sum is 34.

The spelling of 21481654210 in words is "twenty-one billion, four hundred eighty-one million, six hundred fifty-four thousand, two hundred ten".