20196810 has 128 divisors (see below), whose sum is σ = 58982400. Its totient is φ = 4898880.

The previous prime is 20196809. The next prime is 20196811. The reversal of 20196810 is 1869102.

It is an interprime number because it is at equal distance from previous prime (20196809) and next prime (20196811).

It is a super-2 number, since 2×20196810² = 815822268352200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20196811) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 158967 + ... + 159093.

It is an arithmetic number, because the mean of its divisors is an integer number (460800).

Almost surely, 2^20196810 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20196810, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29491200).

20196810 is an abundant number, since it is smaller than the sum of its proper divisors (38785590).

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

20196810 is a wasteful number, since it uses less digits than its factorization.

20196810 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193 (or 187 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 27.

The square root of 20196810 is about 4494.0861139947. The cubic root of 20196810 is about 272.3292311648.

The spelling of 20196810 in words is "twenty million, one hundred ninety-six thousand, eight hundred ten".