20476129 has 4 divisors (see below), whose sum is σ = 21553840. Its totient is φ = 19398420.

The previous prime is 20476051. The next prime is 20476139. The reversal of 20476129 is 92167402.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20476129 - 2²¹ = 18378977 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20476129.

It is not an unprimeable number, because it can be changed into a prime (20476139) 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 in 3 ways as a sum of consecutive naturals, for example, 538827 + ... + 538864.

It is an arithmetic number, because the mean of its divisors is an integer number (5388460).

Almost surely, 2^20476129 is an apocalyptic number.

It is an amenable number.

20476129 is a deficient number, since it is larger than the sum of its proper divisors (1077711).

20476129 is a wasteful number, since it uses less digits than its factorization.

20476129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1077710.

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

The square root of 20476129 is about 4525.0556902650. The cubic root of 20476129 is about 273.5789125777.

The spelling of 20476129 in words is "twenty million, four hundred seventy-six thousand, one hundred twenty-nine".