20129804 has 12 divisors (see below), whose sum is σ = 35279328. Its totient is φ = 10050000.

The previous prime is 20129789. The next prime is 20129833. The reversal of 20129804 is 40892102.

It is a super-3 number, since 3×20129804³ (a number of 23 digits) contains 333 as substring.

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, 347 + ... + 6354.

It is an arithmetic number, because the mean of its divisors is an integer number (2939944).

Almost surely, 2^20129804 is an apocalyptic number.

It is an amenable number.

20129804 is a deficient number, since it is larger than the sum of its proper divisors (15149524).

20129804 is a wasteful number, since it uses less digits than its factorization.

20129804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7456 (or 7454 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 20129804 is about 4486.6250121890. The cubic root of 20129804 is about 272.0277328989.

The spelling of 20129804 in words is "twenty million, one hundred twenty-nine thousand, eight hundred four".