20529369 has 40 divisors (see below), whose sum is σ = 35428800. Its totient is φ = 11652336.

The previous prime is 20529337. The next prime is 20529373. The reversal of 20529369 is 96392502.

It is not a de Polignac number, because 20529369 - 2⁵ = 20529337 is a prime.

It is a super-2 number, since 2×20529369² = 842909983076322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20529389) 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 39 ways as a sum of consecutive naturals, for example, 137707 + ... + 137855.

It is an arithmetic number, because the mean of its divisors is an integer number (885720).

Almost surely, 2^20529369 is an apocalyptic number.

It is an amenable number.

20529369 is a deficient number, since it is larger than the sum of its proper divisors (14899431).

20529369 is an frugal number, since it uses more digits than its factorization.

20529369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183 (or 159 counting only the distinct ones).

The product of its (nonzero) digits is 29160, while the sum is 36.

The square root of 20529369 is about 4530.9346717868. The cubic root of 20529369 is about 273.8158182891.

The spelling of 20529369 in words is "twenty million, five hundred twenty-nine thousand, three hundred sixty-nine".