20079810 has 72 divisors (see below), whose sum is σ = 53870076. Its totient is φ = 5188800.

The previous prime is 20079809. The next prime is 20079817. The reversal of 20079810 is 1897002.

It can be written as a sum of positive squares in 2 ways, for example, as 19105641 + 974169 = 4371^2 + 987^2 .

It is a super-2 number, since 2×20079810² = 806397539272200, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20079817) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 198760 + ... + 198860.

Almost surely, 2^20079810 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20079810, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26935038).

20079810 is an abundant number, since it is smaller than the sum of its proper divisors (33790266).

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

20079810 is a wasteful number, since it uses less digits than its factorization.

20079810 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208 (or 158 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 27.

The square root of 20079810 is about 4481.0501001439. The cubic root of 20079810 is about 271.8023452310.

The spelling of 20079810 in words is "twenty million, seventy-nine thousand, eight hundred ten".