20397850 has 24 divisors (see below), whose sum is σ = 41390208. Its totient is φ = 7417200.

The previous prime is 20397847. The next prime is 20397863. The reversal of 20397850 is 5879302.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17994 + ... + 19093.

It is an arithmetic number, because the mean of its divisors is an integer number (1724592).

Almost surely, 2^20397850 is an apocalyptic number.

20397850 is an abundant number, since it is smaller than the sum of its proper divisors (20992358).

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

20397850 is a wasteful number, since it uses less digits than its factorization.

20397850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37110 (or 37105 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 34.

The square root of 20397850 is about 4516.3979009826. The cubic root of 20397850 is about 273.2298421742.

It can be divided in two parts, 2039 and 7850, that added together give a palindrome (9889).

The spelling of 20397850 in words is "twenty million, three hundred ninety-seven thousand, eight hundred fifty".