20249810 has 16 divisors (see below), whose sum is σ = 41656896. Its totient is φ = 6942768.

The previous prime is 20249791. The next prime is 20249813. The reversal of 20249810 is 1894202.

It is a super-2 number, since 2×20249810² = 820109610072200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20249810.

It is not an unprimeable number, because it can be changed into a prime (20249813) 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, 144572 + ... + 144711.

It is an arithmetic number, because the mean of its divisors is an integer number (2603556).

Almost surely, 2^20249810 is an apocalyptic number.

20249810 is an abundant number, since it is smaller than the sum of its proper divisors (21407086).

20249810 is a wasteful number, since it uses less digits than its factorization.

20249810 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289297.

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 20249810 is about 4499.9788888394. The cubic root of 20249810 is about 272.5672364458.

The spelling of 20249810 in words is "twenty million, two hundred forty-nine thousand, eight hundred ten".