21115653465306 has 32 divisors (see below), whose sum is σ = 42834869133120. Its totient is φ = 6938070297984.

The previous prime is 21115653465287. The next prime is 21115653465329. The reversal of 21115653465306 is 60356435651112.

It is a super-2 number, since 2×21115653465306² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13355980 + ... + 14853063.

It is an arithmetic number, because the mean of its divisors is an integer number (1338589660410).

Almost surely, 2^{21115653465306} is an apocalyptic number.

21115653465306 is an abundant number, since it is smaller than the sum of its proper divisors (21719215667814).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21115653465306 is a wasteful number, since it uses less digits than its factorization.

21115653465306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28210830.

The product of its (nonzero) digits is 1944000, while the sum is 48.

The spelling of 21115653465306 in words is "twenty-one trillion, one hundred fifteen billion, six hundred fifty-three million, four hundred sixty-five thousand, three hundred six".