20248429 has 4 divisors (see below), whose sum is σ = 20258460. Its totient is φ = 20238400.

The previous prime is 20248427. The next prime is 20248451. The reversal of 20248429 is 92484202.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 92484202 = 2 ⋅46242101.

It can be written as a sum of positive squares in 2 ways, for example, as 17015625 + 3232804 = 4125^2 + 1798^2 .

It is a cyclic number.

It is not a de Polignac number, because 20248429 - 2¹ = 20248427 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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 20248429.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20248427) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 814 + ... + 6415.

It is an arithmetic number, because the mean of its divisors is an integer number (5064615).

Almost surely, 2^20248429 is an apocalyptic number.

It is an amenable number.

20248429 is a deficient number, since it is larger than the sum of its proper divisors (10031).

20248429 is an equidigital number, since it uses as much as digits as its factorization.

20248429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10030.

The product of its (nonzero) digits is 9216, while the sum is 31.

The square root of 20248429 is about 4499.8254410588. The cubic root of 20248429 is about 272.5610401093.

The spelling of 20248429 in words is "twenty million, two hundred forty-eight thousand, four hundred twenty-nine".