20396610 has 120 divisors (see below), whose sum is σ = 59786100. Its totient is φ = 4987008.

The previous prime is 20396591. The next prime is 20396681. The reversal of 20396610 is 1669302.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 227529 + 20169081 = 477^2 + 4491^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 136816 + ... + 136964.

Almost surely, 2^20396610 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20396610, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29893050).

20396610 is an abundant number, since it is smaller than the sum of its proper divisors (39389490).

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

20396610 is a wasteful number, since it uses less digits than its factorization.

20396610 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194 (or 172 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 27.

The square root of 20396610 is about 4516.2606213548. The cubic root of 20396610 is about 273.2243054490.

It can be divided in two parts, 2039 and 6610, that added together give a square (8649 = 93²).

The spelling of 20396610 in words is "twenty million, three hundred ninety-six thousand, six hundred ten".