21029110 has 16 divisors (see below), whose sum is σ = 38372256. Its totient is φ = 8296128.

The previous prime is 21029101. The next prime is 21029111. The reversal of 21029110 is 1192012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21029111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13674 + ... + 15133.

It is an arithmetic number, because the mean of its divisors is an integer number (2398266).

Almost surely, 2^21029110 is an apocalyptic number.

21029110 is a deficient number, since it is larger than the sum of its proper divisors (17343146).

21029110 is a wasteful number, since it uses less digits than its factorization.

21029110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28887.

The product of its (nonzero) digits is 36, while the sum is 16.

The square root of 21029110 is about 4585.7507564193. The cubic root of 21029110 is about 276.0198385936.

The spelling of 21029110 in words is "twenty-one million, twenty-nine thousand, one hundred ten".