20129476 has 6 divisors (see below), whose sum is σ = 35226590. Its totient is φ = 10064736.

The previous prime is 20129471. The next prime is 20129497. The reversal of 20129476 is 67492102.

It can be written as a sum of positive squares in only one way, i.e., 19149376 + 980100 = 4376^2 + 990^2 .

It is not an unprimeable number, because it can be changed into a prime (20129471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2516181 + ... + 2516188.

Almost surely, 2^20129476 is an apocalyptic number.

It is an amenable number.

20129476 is a deficient number, since it is larger than the sum of its proper divisors (15097114).

20129476 is a wasteful number, since it uses less digits than its factorization.

20129476 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5032373 (or 5032371 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 20129476 is about 4486.5884589519. The cubic root of 20129476 is about 272.0262553952.

The spelling of 20129476 in words is "twenty million, one hundred twenty-nine thousand, four hundred seventy-six".