21613342610 has 32 divisors (see below), whose sum is σ = 39141868464. Its totient is φ = 8592640000.

The previous prime is 21613342589. The next prime is 21613342613. The reversal of 21613342610 is 1624331612.

It can be written as a sum of positive squares in 8 ways, for example, as 19886358361 + 1726984249 = 141019^2 + 41557^2 .

It is a super-3 number, since 3×21613342610³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (21613342613) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1117220 + ... + 1136400.

Almost surely, 2^21613342610 is an apocalyptic number.

21613342610 is a deficient number, since it is larger than the sum of its proper divisors (17528525854).

21613342610 is a wasteful number, since it uses less digits than its factorization.

21613342610 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19870.

The product of its (nonzero) digits is 5184, while the sum is 29.

The spelling of 21613342610 in words is "twenty-one billion, six hundred thirteen million, three hundred forty-two thousand, six hundred ten".