21043126610 has 32 divisors (see below), whose sum is σ = 41559936192. Its totient is φ = 7607807680.

The previous prime is 21043126607. The next prime is 21043126613. The reversal of 21043126610 is 1662134012.

It is an interprime number because it is at equal distance from previous prime (21043126607) and next prime (21043126613).

It is a self number, because there is not a number n which added to its sum of digits gives 21043126610.

It is not an unprimeable number, because it can be changed into a prime (21043126613) 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, 533864 + ... + 571923.

It is an arithmetic number, because the mean of its divisors is an integer number (1298748006).

Almost surely, 2^21043126610 is an apocalyptic number.

21043126610 is a deficient number, since it is larger than the sum of its proper divisors (20516809582).

21043126610 is a wasteful number, since it uses less digits than its factorization.

21043126610 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1105978.

The product of its (nonzero) digits is 1728, while the sum is 26.

The spelling of 21043126610 in words is "twenty-one billion, forty-three million, one hundred twenty-six thousand, six hundred ten".