21067900810 has 32 divisors (see below), whose sum is σ = 41423659200. Its totient is φ = 7651061760.

The previous prime is 21067900769. The next prime is 21067900817. The reversal of 21067900810 is 1800976012.

It is a happy number.

It is a super-2 number, since 2×21067900810² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21067900817) 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, 39940 + ... + 209119.

It is an arithmetic number, because the mean of its divisors is an integer number (1294489350).

Almost surely, 2^21067900810 is an apocalyptic number.

21067900810 is a deficient number, since it is larger than the sum of its proper divisors (20355758390).

21067900810 is a wasteful number, since it uses less digits than its factorization.

21067900810 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249846.

The product of its (nonzero) digits is 6048, while the sum is 34.

The spelling of 21067900810 in words is "twenty-one billion, sixty-seven million, nine hundred thousand, eight hundred ten".