20513350 has 96 divisors (see below), whose sum is σ = 47496960. Its totient is φ = 6480000.

The previous prime is 20513341. The next prime is 20513371. The reversal of 20513350 is 5331502.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 135775 + ... + 135925.

It is an arithmetic number, because the mean of its divisors is an integer number (494760).

Almost surely, 2^20513350 is an apocalyptic number.

20513350 is an abundant number, since it is smaller than the sum of its proper divisors (26983610).

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

20513350 is a wasteful number, since it uses less digits than its factorization.

20513350 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206 (or 201 counting only the distinct ones).

The product of its (nonzero) digits is 450, while the sum is 19.

The square root of 20513350 is about 4529.1665900031. The cubic root of 20513350 is about 273.7445805589.

Adding to 20513350 its reverse (5331502), we get a palindrome (25844852).

The spelling of 20513350 in words is "twenty million, five hundred thirteen thousand, three hundred fifty".