20152429 has 24 divisors (see below), whose sum is σ = 23930424. Its totient is φ = 16896000.

The previous prime is 20152421. The next prime is 20152441. The reversal of 20152429 is 92425102.

It can be written as a sum of positive squares in 4 ways, for example, as 10530025 + 9622404 = 3245^2 + 3102^2 .

It is not a de Polignac number, because 20152429 - 2³ = 20152421 is a prime.

It is a super-2 number, since 2×20152429² = 812240789200082, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20152421) 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 23 ways as a sum of consecutive naturals, for example, 199479 + ... + 199579.

It is an arithmetic number, because the mean of its divisors is an integer number (997101).

Almost surely, 2^20152429 is an apocalyptic number.

It is an amenable number.

20152429 is a deficient number, since it is larger than the sum of its proper divisors (3777995).

20152429 is a wasteful number, since it uses less digits than its factorization.

20152429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237 (or 226 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 20152429 is about 4489.1456870990. The cubic root of 20152429 is about 272.1296104111.

It can be divided in two parts, 2015 and 2429, that added together give a palindrome (4444).

The spelling of 20152429 in words is "twenty million, one hundred fifty-two thousand, four hundred twenty-nine".