21629108 has 12 divisors (see below), whose sum is σ = 39496800. Its totient is φ = 10344312.

The previous prime is 21629063. The next prime is 21629119. The reversal of 21629108 is 80192612.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 117458 + ... + 117641.

It is an arithmetic number, because the mean of its divisors is an integer number (3291400).

Almost surely, 2^21629108 is an apocalyptic number.

It is an amenable number.

21629108 is a deficient number, since it is larger than the sum of its proper divisors (17867692).

21629108 is a wasteful number, since it uses less digits than its factorization.

21629108 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235126 (or 235124 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 29.

The square root of 21629108 is about 4650.7104833563. The cubic root of 21629108 is about 278.6203732791.

The spelling of 21629108 in words is "twenty-one million, six hundred twenty-nine thousand, one hundred eight".