21649466310 has 32 divisors (see below), whose sum is σ = 52001641440. Its totient is φ = 5768421888.

The previous prime is 21649466273. The next prime is 21649466329. The reversal of 21649466310 is 1366494612.

It is a happy number.

It is a super-2 number, since 2×21649466310² (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 15 ways as a sum of consecutive naturals, for example, 261075 + ... + 333854.

It is an arithmetic number, because the mean of its divisors is an integer number (1625051295).

Almost surely, 2^21649466310 is an apocalyptic number.

21649466310 is an abundant number, since it is smaller than the sum of its proper divisors (30352175130).

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

21649466310 is a wasteful number, since it uses less digits than its factorization.

21649466310 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 596152.

The product of its (nonzero) digits is 186624, while the sum is 42.

The spelling of 21649466310 in words is "twenty-one billion, six hundred forty-nine million, four hundred sixty-six thousand, three hundred ten".