20705010 has 32 divisors (see below), whose sum is σ = 50438592. Its totient is φ = 5438400.

The previous prime is 20704987. The next prime is 20705017. The reversal of 20705010 is 1050702.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is not an unprimeable number, because it can be changed into a prime (20705017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3141 + ... + 7160.

It is an arithmetic number, because the mean of its divisors is an integer number (1576206).

Almost surely, 2^20705010 is an apocalyptic number.

20705010 is an abundant number, since it is smaller than the sum of its proper divisors (29733582).

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

20705010 is a wasteful number, since it uses less digits than its factorization.

20705010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10378.

The product of its (nonzero) digits is 70, while the sum is 15.

The square root of 20705010 is about 4550.2758158160. The cubic root of 20705010 is about 274.5944877290.

Adding to 20705010 its reverse (1050702), we get a palindrome (21755712).

The spelling of 20705010 in words is "twenty million, seven hundred five thousand, ten".