20521096 has 32 divisors (see below), whose sum is σ = 40095000. Its totient is φ = 9834496.

The previous prime is 20521073. The next prime is 20521099. The reversal of 20521096 is 69012502.

It can be written as a sum of positive squares in 4 ways, for example, as 20520900 + 196 = 4530^2 + 14^2 .

It is a super-2 number, since 2×20521096² = 842230762082432, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20521096.

It is not an unprimeable number, because it can be changed into a prime (20521099) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45480 + ... + 45928.

Almost surely, 2^20521096 is an apocalyptic number.

It is an amenable number.

20521096 is a deficient number, since it is larger than the sum of its proper divisors (19573904).

20521096 is a wasteful number, since it uses less digits than its factorization.

20521096 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 681 (or 677 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 20521096 is about 4530.0216335024. The cubic root of 20521096 is about 273.7790322482.

Adding to 20521096 its reverse (69012502), we get a palindrome (89533598).

The spelling of 20521096 in words is "twenty million, five hundred twenty-one thousand, ninety-six".