20504196 has 36 divisors (see below), whose sum is σ = 52324272. Its totient is φ = 6769584.

The previous prime is 20504191. The next prime is 20504203. The reversal of 20504196 is 69140502.

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (20504191) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1191 + ... + 6513.

It is an arithmetic number, because the mean of its divisors is an integer number (1453452).

Almost surely, 2^20504196 is an apocalyptic number.

It is an amenable number.

20504196 is an abundant number, since it is smaller than the sum of its proper divisors (31820076).

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

20504196 is a wasteful number, since it uses less digits than its factorization.

20504196 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5440 (or 5435 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 20504196 is about 4528.1559160435. The cubic root of 20504196 is about 273.7038553609.

Adding to 20504196 its reverse (69140502), we get a palindrome (89644698).

The spelling of 20504196 in words is "twenty million, five hundred four thousand, one hundred ninety-six".