20097536 has 40 divisors (see below), whose sum is σ = 42536340. Its totient is φ = 9453568.

The previous prime is 20097509. The next prime is 20097563. The reversal of 20097536 is 63579002.

It is an interprime number because it is at equal distance from previous prime (20097509) and next prime (20097563).

It can be written as a sum of positive squares in 2 ways, for example, as 17977600 + 2119936 = 4240^2 + 1456^2 .

It is a Harshad number since it is a multiple of its sum of digits (32).

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, 7550 + ... + 9858.

Almost surely, 2^20097536 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 20097536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21268170).

20097536 is an abundant number, since it is smaller than the sum of its proper divisors (22438804).

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

20097536 is an equidigital number, since it uses as much as digits as its factorization.

20097536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2344 (or 2328 counting only the distinct ones).

The product of its (nonzero) digits is 11340, while the sum is 32.

The square root of 20097536 is about 4483.0275484320. The cubic root of 20097536 is about 271.8823020191.

The spelling of 20097536 in words is "twenty million, ninety-seven thousand, five hundred thirty-six".