20513353 has 8 divisors (see below), whose sum is σ = 24252480. Its totient is φ = 16976400.

The previous prime is 20513341. The next prime is 20513371. The reversal of 20513353 is 35331502.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20513353 - 2⁹ = 20512841 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20513303) 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, 50323 + ... + 50728.

It is an arithmetic number, because the mean of its divisors is an integer number (3031560).

Almost surely, 2^20513353 is an apocalyptic number.

It is an amenable number.

20513353 is a deficient number, since it is larger than the sum of its proper divisors (3739127).

20513353 is a wasteful number, since it uses less digits than its factorization.

20513353 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101087.

The product of its (nonzero) digits is 1350, while the sum is 22.

The square root of 20513353 is about 4529.1669211898. The cubic root of 20513353 is about 273.7445939037.

Adding to 20513353 its reverse (35331502), we get a palindrome (55844855).

The spelling of 20513353 in words is "twenty million, five hundred thirteen thousand, three hundred fifty-three".