20547429 has 8 divisors (see below), whose sum is σ = 31310400. Its totient is φ = 11741376.

The previous prime is 20547427. The next prime is 20547431. The reversal of 20547429 is 92474502.

20547429 is an esthetic number in base 13, because in such base its adjacent digits differ by 1.

It is an interprime number because it is at equal distance from previous prime (20547427) and next prime (20547431).

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

It is not a de Polignac number, because 20547429 - 2¹ = 20547427 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20547429.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20547427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 489204 + ... + 489245.

It is an arithmetic number, because the mean of its divisors is an integer number (3913800).

Almost surely, 2^20547429 is an apocalyptic number.

It is an amenable number.

20547429 is a deficient number, since it is larger than the sum of its proper divisors (10762971).

20547429 is an equidigital number, since it uses as much as digits as its factorization.

20547429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 978459.

The product of its (nonzero) digits is 20160, while the sum is 33.

The square root of 20547429 is about 4532.9271999449. The cubic root of 20547429 is about 273.8960880771.

The spelling of 20547429 in words is "twenty million, five hundred forty-seven thousand, four hundred twenty-nine".