20740000 has 120 divisors (see below), whose sum is σ = 54910548. Its totient is φ = 7680000.

The previous prime is 20739947. The next prime is 20740003. The reversal of 20740000 is 4702.

It can be written as a sum of positive squares in 10 ways, for example, as 3732624 + 17007376 = 1932^2 + 4124^2 .

It is not an unprimeable number, because it can be changed into a prime (20740003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 339970 + ... + 340030.

Almost surely, 2^20740000 is an apocalyptic number.

20740000 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 20740000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27455274).

20740000 is an abundant number, since it is smaller than the sum of its proper divisors (34170548).

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

20740000 is an equidigital number, since it uses as much as digits as its factorization.

20740000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108 (or 85 counting only the distinct ones).

The product of its (nonzero) digits is 56, while the sum is 13.

The square root of 20740000 is about 4554.1190146943. The cubic root of 20740000 is about 274.7490824203.

Adding to 20740000 its reverse (4702), we get a palindrome (20744702).

The spelling of 20740000 in words is "twenty million, seven hundred forty thousand".