20604129 has 32 divisors (see below), whose sum is σ = 34320384. Its totient is φ = 10704960.

The previous prime is 20604107. The next prime is 20604131. The reversal of 20604129 is 92140602.

It is not a de Polignac number, because 20604129 - 2⁸ = 20603873 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20604099 and 20604108.

It is not an unprimeable number, because it can be changed into a prime (20604139) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18852 + ... + 19914.

It is an arithmetic number, because the mean of its divisors is an integer number (1072512).

Almost surely, 2^20604129 is an apocalyptic number.

It is an amenable number.

20604129 is a deficient number, since it is larger than the sum of its proper divisors (13716255).

20604129 is a wasteful number, since it uses less digits than its factorization.

20604129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1157.

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 20604129 is about 4539.1771280707. The cubic root of 20604129 is about 274.1477926461.

The spelling of 20604129 in words is "twenty million, six hundred four thousand, one hundred twenty-nine".