20696544 has 144 divisors (see below), whose sum is σ = 66044160. Its totient is φ = 6094080.

The previous prime is 20696521. The next prime is 20696549. The reversal of 20696544 is 44569602.

20696544 is a `hidden beast` number, since 20 + 6 + 96 + 544 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 20696499 and 20696508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20696549) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 148827 + ... + 148965.

It is an arithmetic number, because the mean of its divisors is an integer number (458640).

Almost surely, 2^20696544 is an apocalyptic number.

20696544 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20696544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33022080).

20696544 is an abundant number, since it is smaller than the sum of its proper divisors (45347616).

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

20696544 is a wasteful number, since it uses less digits than its factorization.

20696544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213 (or 202 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The square root of 20696544 is about 4549.3454474243. The cubic root of 20696544 is about 274.5570566297.

The spelling of 20696544 in words is "twenty million, six hundred ninety-six thousand, five hundred forty-four".