20695040 has 96 divisors (see below), whose sum is σ = 51891840. Its totient is φ = 7913472.

The previous prime is 20695033. The next prime is 20695061. The reversal of 20695040 is 4059602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 440297 + ... + 440343.

It is an arithmetic number, because the mean of its divisors is an integer number (540540).

Almost surely, 2^20695040 is an apocalyptic number.

20695040 is a gapful number since it is divisible by the number (20) 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 20695040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25945920).

20695040 is an abundant number, since it is smaller than the sum of its proper divisors (31196800).

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

20695040 is an equidigital number, since it uses as much as digits as its factorization.

20695040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117 (or 97 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 20695040 is about 4549.1801459164. The cubic root of 20695040 is about 274.5504058605.

The spelling of 20695040 in words is "twenty million, six hundred ninety-five thousand, forty".