21213554610346 has 16 divisors (see below), whose sum is σ = 36380032390080. Its totient is φ = 9088038711360.

The previous prime is 21213554610329. The next prime is 21213554610377. The reversal of 21213554610346 is 64301645531212.

It is a super-2 number, since 2×21213554610346² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 290353260 + ... + 290426311.

It is an arithmetic number, because the mean of its divisors is an integer number (2273752024380).

Almost surely, 2^{21213554610346} is an apocalyptic number.

21213554610346 is a deficient number, since it is larger than the sum of its proper divisors (15166477779734).

21213554610346 is a wasteful number, since it uses less digits than its factorization.

21213554610346 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 580782189.

The product of its (nonzero) digits is 518400, while the sum is 43.

The spelling of 21213554610346 in words is "twenty-one trillion, two hundred thirteen billion, five hundred fifty-four million, six hundred ten thousand, three hundred forty-six".