20257024 has 36 divisors (see below), whose sum is σ = 41225436. Its totient is φ = 9930752.

The previous prime is 20256967. The next prime is 20257067. The reversal of 20257024 is 42075202.

It can be written as a sum of positive squares in 2 ways, for example, as 16257024 + 4000000 = 4032^2 + 2000^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20256986 and 20257004.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12822 + ... + 14314.

It is an arithmetic number, because the mean of its divisors is an integer number (1145151).

Almost surely, 2^20257024 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 20257024, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20612718).

20257024 is an abundant number, since it is smaller than the sum of its proper divisors (20968412).

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

20257024 is an equidigital number, since it uses as much as digits as its factorization.

20257024 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1562 (or 1548 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 22.

The square root of 20257024 is about 4500.7803767791. The cubic root of 20257024 is about 272.5995999856.

The spelling of 20257024 in words is "twenty million, two hundred fifty-seven thousand, twenty-four".