20513252 has 12 divisors (see below), whose sum is σ = 36004080. Its totient is φ = 10226376.

The previous prime is 20513231. The next prime is 20513257. The reversal of 20513252 is 25231502.

It is not an unprimeable number, because it can be changed into a prime (20513257) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6002 + ... + 8777.

It is an arithmetic number, because the mean of its divisors is an integer number (3000340).

Almost surely, 2^20513252 is an apocalyptic number.

It is an amenable number.

20513252 is a deficient number, since it is larger than the sum of its proper divisors (15490828).

20513252 is a wasteful number, since it uses less digits than its factorization.

20513252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15130 (or 15128 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 20513252 is about 4529.1557712227. The cubic root of 20513252 is about 273.7441446313.

Adding to 20513252 its reverse (25231502), we get a palindrome (45744754).

The spelling of 20513252 in words is "twenty million, five hundred thirteen thousand, two hundred fifty-two".