20529516 has 24 divisors (see below), whose sum is σ = 54745600. Its totient is φ = 5865552.

The previous prime is 20529511. The next prime is 20529521. The reversal of 20529516 is 61592502.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20529511) and next prime (20529521).

It is a super-2 number, since 2×20529516² = 842922054388512, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20529511) 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 7 ways as a sum of consecutive naturals, for example, 122116 + ... + 122283.

Almost surely, 2^20529516 is an apocalyptic number.

It is an amenable number.

20529516 is an abundant number, since it is smaller than the sum of its proper divisors (34216084).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20529516 is a wasteful number, since it uses less digits than its factorization.

20529516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244413 (or 244411 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 30.

The square root of 20529516 is about 4530.9508935763. The cubic root of 20529516 is about 273.8164718379.

The spelling of 20529516 in words is "twenty million, five hundred twenty-nine thousand, five hundred sixteen".