20129610 has 16 divisors (see below), whose sum is σ = 48311136. Its totient is φ = 5367888.

The previous prime is 20129597. The next prime is 20129639. The reversal of 20129610 is 1692102.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 335464 + ... + 335523.

It is an arithmetic number, because the mean of its divisors is an integer number (3019446).

Almost surely, 2^20129610 is an apocalyptic number.

20129610 is an abundant number, since it is smaller than the sum of its proper divisors (28181526).

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

20129610 is a wasteful number, since it uses less digits than its factorization.

20129610 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 670997.

The product of its (nonzero) digits is 216, while the sum is 21.

The square root of 20129610 is about 4486.6033923225. The cubic root of 20129610 is about 272.0268590115.

The spelling of 20129610 in words is "twenty million, one hundred twenty-nine thousand, six hundred ten".