20513196 has 96 divisors (see below), whose sum is σ = 59996160. Its totient is φ = 6004800.

The previous prime is 20513191. The next prime is 20513231. The reversal of 20513196 is 69131502.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (20513191) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 36550 + ... + 37106.

It is an arithmetic number, because the mean of its divisors is an integer number (624960).

Almost surely, 2^20513196 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20513196, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29998080).

20513196 is an abundant number, since it is smaller than the sum of its proper divisors (39482964).

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

20513196 is a wasteful number, since it uses less digits than its factorization.

20513196 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 612 (or 604 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 27.

The square root of 20513196 is about 4529.1495890509. The cubic root of 20513196 is about 273.7438955291.

Adding to 20513196 its reverse (69131502), we get a palindrome (89644698).

It can be divided in two parts, 2051319 and 6, that added together give a triangular number (2051325 = T₂₀₂₅).

The spelling of 20513196 in words is "twenty million, five hundred thirteen thousand, one hundred ninety-six".