20753920 has 120 divisors (see below), whose sum is σ = 55512072. Its totient is φ = 7434240.

The previous prime is 20753917. The next prime is 20753933. The reversal of 20753920 is 2935702.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 309727 + ... + 309793.

Almost surely, 2^20753920 is an apocalyptic number.

20753920 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 20753920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27756036).

20753920 is an abundant number, since it is smaller than the sum of its proper divisors (34758152).

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

20753920 is an equidigital number, since it uses as much as digits as its factorization.

20753920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112 (or 85 counting only the distinct ones).

The product of its (nonzero) digits is 3780, while the sum is 28.

The square root of 20753920 is about 4555.6470451518. The cubic root of 20753920 is about 274.8105361638.

It can be divided in two parts, 2075 and 3920, that added together give a palindrome (5995).

The spelling of 20753920 in words is "twenty million, seven hundred fifty-three thousand, nine hundred twenty".