20755476 has 72 divisors (see below), whose sum is σ = 62584704. Its totient is φ = 5670720.

The previous prime is 20755463. The next prime is 20755507. The reversal of 20755476 is 67455702.

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

It is a self number, because there is not a number n which added to its sum of digits gives 20755476.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4006 + ... + 7586.

It is an arithmetic number, because the mean of its divisors is an integer number (869232).

Almost surely, 2^20755476 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 20755476, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31292352).

20755476 is an abundant number, since it is smaller than the sum of its proper divisors (41829228).

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

20755476 is a wasteful number, since it uses less digits than its factorization.

20755476 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3621 (or 3616 counting only the distinct ones).

The product of its (nonzero) digits is 58800, while the sum is 36.

The square root of 20755476 is about 4555.8178190090. The cubic root of 20755476 is about 274.8174038544.

The spelling of 20755476 in words is "twenty million, seven hundred fifty-five thousand, four hundred seventy-six".