20673129 has 8 divisors (see below), whose sum is σ = 27586912. Its totient is φ = 13770720.

The previous prime is 20673101. The next prime is 20673131. The reversal of 20673129 is 92137602.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20673129 - 2¹¹ = 20671081 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20673096 and 20673105.

It is not an unprimeable number, because it can be changed into a prime (20673199) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3294 + ... + 7224.

It is an arithmetic number, because the mean of its divisors is an integer number (3448364).

Almost surely, 2^20673129 is an apocalyptic number.

It is an amenable number.

20673129 is a deficient number, since it is larger than the sum of its proper divisors (6913783).

20673129 is a wasteful number, since it uses less digits than its factorization.

20673129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5687.

The product of its (nonzero) digits is 4536, while the sum is 30.

The square root of 20673129 is about 4546.7712720127. The cubic root of 20673129 is about 274.4534776716.

It can be divided in two parts, 20673 and 129, that added together give a palindrome (20802).

The spelling of 20673129 in words is "twenty million, six hundred seventy-three thousand, one hundred twenty-nine".