20002429 has 2 divisors, whose sum is σ = 20002430. Its totient is φ = 20002428.

The previous prime is 20002417. The next prime is 20002453. The reversal of 20002429 is 92420002.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12766329 + 7236100 = 3573^2 + 2690^2 .

It is a cyclic number.

It is not a de Polignac number, because 20002429 - 2⁵ = 20002397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20002529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10001214 + 10001215.

It is an arithmetic number, because the mean of its divisors is an integer number (10001215).

Almost surely, 2^20002429 is an apocalyptic number.

It is an amenable number.

20002429 is a deficient number, since it is larger than the sum of its proper divisors (1).

20002429 is an equidigital number, since it uses as much as digits as its factorization.

20002429 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 20002429 is about 4472.4075172104. The cubic root of 20002429 is about 271.4527500820.

It can be divided in two parts, 20002 and 429, that multiplied together give a palindrome (8580858).

The spelling of 20002429 in words is "twenty million, two thousand, four hundred twenty-nine".