20695788 has 72 divisors (see below), whose sum is σ = 55910400. Its totient is φ = 6435936.

The previous prime is 20695751. The next prime is 20695789. The reversal of 20695788 is 88759602.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20695789) 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, 53845 + ... + 54227.

Almost surely, 2^20695788 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20695788, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27955200).

20695788 is an abundant number, since it is smaller than the sum of its proper divisors (35214612).

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

20695788 is a wasteful number, since it uses less digits than its factorization.

20695788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 491 (or 486 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 45.

The square root of 20695788 is about 4549.2623577894. The cubic root of 20695788 is about 274.5537135972.

The spelling of 20695788 in words is "twenty million, six hundred ninety-five thousand, seven hundred eighty-eight".