20257350 has 24 divisors (see below), whose sum is σ = 50238600. Its totient is φ = 5401920.

The previous prime is 20257337. The next prime is 20257351. The reversal of 20257350 is 5375202.

It is a self number, because there is not a number n which added to its sum of digits gives 20257350.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20257351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 67375 + ... + 67674.

It is an arithmetic number, because the mean of its divisors is an integer number (2093275).

Almost surely, 2^20257350 is an apocalyptic number.

20257350 is an abundant number, since it is smaller than the sum of its proper divisors (29981250).

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

20257350 is a wasteful number, since it uses less digits than its factorization.

20257350 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135064 (or 135059 counting only the distinct ones).

The product of its (nonzero) digits is 2100, while the sum is 24.

The square root of 20257350 is about 4500.8165925752. The cubic root of 20257350 is about 272.6010623095.

The spelling of 20257350 in words is "twenty million, two hundred fifty-seven thousand, three hundred fifty".