20696130 has 216 divisors, whose sum is σ = 71144892. Its totient is φ = 4136832.

The previous prime is 20696119. The next prime is 20696147. The reversal of 20696130 is 3169602.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 19263321 + 1432809 = 4389^2 + 1197^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20696094 and 20696103.

It is an unprimeable number.

It is a polite number, since it can be written in 107 ways as a sum of consecutive naturals, for example, 1089261 + ... + 1089279.

Almost surely, 2^20696130 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20696130, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35572446).

20696130 is an abundant number, since it is smaller than the sum of its proper divisors (50448762).

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

20696130 is a wasteful number, since it uses less digits than its factorization.

20696130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78 (or 49 counting only the distinct ones).

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

The square root of 20696130 is about 4549.2999461456. The cubic root of 20696130 is about 274.5552259315. Note that the first 3 decimals are identical.

The spelling of 20696130 in words is "twenty million, six hundred ninety-six thousand, one hundred thirty".