20029549 has 8 divisors (see below), whose sum is σ = 20260800. Its totient is φ = 19800000.

The previous prime is 20029547. The next prime is 20029561. The reversal of 20029549 is 94592002.

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

It is a cyclic number.

It is not a de Polignac number, because 20029549 - 2¹ = 20029547 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 20029549.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20029547) 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 7 ways as a sum of consecutive naturals, for example, 49749 + ... + 50149.

It is an arithmetic number, because the mean of its divisors is an integer number (2532600).

Almost surely, 2^20029549 is an apocalyptic number.

It is an amenable number.

20029549 is a deficient number, since it is larger than the sum of its proper divisors (231251).

20029549 is a wasteful number, since it uses less digits than its factorization.

20029549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 851.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 20029549 is about 4475.4384142785. The cubic root of 20029549 is about 271.5753764216.

The spelling of 20029549 in words is "twenty million, twenty-nine thousand, five hundred forty-nine".