20129896 has 16 divisors (see below), whose sum is σ = 38261700. Its totient is φ = 9926784.

The previous prime is 20129869. The next prime is 20129897. The reversal of 20129896 is 69892102.

It can be written as a sum of positive squares in 2 ways, for example, as 19980900 + 148996 = 4470^2 + 386^2 .

It is not an unprimeable number, because it can be changed into a prime (20129897) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16651 + ... + 17818.

Almost surely, 2^20129896 is an apocalyptic number.

It is an amenable number.

20129896 is a deficient number, since it is larger than the sum of its proper divisors (18131804).

20129896 is a wasteful number, since it uses less digits than its factorization.

20129896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34548 (or 34544 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 37.

The square root of 20129896 is about 4486.6352648728. The cubic root of 20129896 is about 272.0281473178.

It can be divided in two parts, 20129 and 896, that added together give a square (21025 = 145²).

The spelling of 20129896 in words is "twenty million, one hundred twenty-nine thousand, eight hundred ninety-six".