20313550 has 12 divisors (see below), whose sum is σ = 37783296. Its totient is φ = 8125400.

The previous prime is 20313511. The next prime is 20313563. The reversal of 20313550 is 5531302.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 203086 + ... + 203185.

It is an arithmetic number, because the mean of its divisors is an integer number (3148608).

Almost surely, 2^20313550 is an apocalyptic number.

20313550 is a deficient number, since it is larger than the sum of its proper divisors (17469746).

20313550 is a wasteful number, since it uses less digits than its factorization.

20313550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 406283 (or 406278 counting only the distinct ones).

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

The square root of 20313550 is about 4507.0555798659. The cubic root of 20313550 is about 272.8529220690.

Adding to 20313550 its reverse (5531302), we get a palindrome (25844852).

The spelling of 20313550 in words is "twenty million, three hundred thirteen thousand, five hundred fifty".