20240000 has 160 divisors (see below), whose sum is σ = 57356640. Its totient is φ = 7040000.

The previous prime is 20239991. The next prime is 20240021. The reversal of 20240000 is 4202.

It is a tau number, because it is divible by the number of its divisors (160).

It is a Harshad number since it is a multiple of its sum of digits (8).

It is a self number, because there is not a number n which added to its sum of digits gives 20240000.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 879989 + ... + 880011.

It is an arithmetic number, because the mean of its divisors is an integer number (358479).

Almost surely, 2^20240000 is an apocalyptic number.

20240000 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 20240000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28678320).

20240000 is an abundant number, since it is smaller than the sum of its proper divisors (37116640).

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

20240000 is an equidigital number, since it uses as much as digits as its factorization.

20240000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68 (or 41 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 8.

The square root of 20240000 is about 4498.8887516808. Note that the first 3 decimals coincide. The cubic root of 20240000 is about 272.5232143621.

Adding to 20240000 its reverse (4202), we get a palindrome (20244202).

The spelling of 20240000 in words is "twenty million, two hundred forty thousand".