27450020 has 48 divisors (see below), whose sum is σ = 62995968. Its totient is φ = 9985920.

The previous prime is 27450013. The next prime is 27450023. The reversal of 27450020 is 2005472.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 27449974 and 27450001.

It is not an unprimeable number, because it can be changed into a prime (27450023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17717 + ... + 19203.

It is an arithmetic number, because the mean of its divisors is an integer number (1312416).

Almost surely, 2^27450020 is an apocalyptic number.

27450020 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 27450020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31497984).

27450020 is an abundant number, since it is smaller than the sum of its proper divisors (35545948).

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

27450020 is a wasteful number, since it uses less digits than its factorization.

27450020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1580 (or 1578 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 20.

The square root of 27450020 is about 5239.2766676327. The cubic root of 27450020 is about 301.6575654625.

Adding to 27450020 its reverse (2005472), we get a palindrome (29455492).

The spelling of 27450020 in words is "twenty-seven million, four hundred fifty thousand, twenty".