20180481 has 8 divisors (see below), whose sum is σ = 27168960. Its totient is φ = 13322832.

The previous prime is 20180477. The next prime is 20180509. The reversal of 20180481 is 18408102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20180481 - 2² = 20180477 is a prime.

It is a super-2 number, since 2×20180481² = 814503626782722, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20180441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32346 + ... + 32963.

It is an arithmetic number, because the mean of its divisors is an integer number (3396120).

Almost surely, 2^20180481 is an apocalyptic number.

It is an amenable number.

20180481 is a deficient number, since it is larger than the sum of its proper divisors (6988479).

20180481 is a wasteful number, since it uses less digits than its factorization.

20180481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65415.

The product of its (nonzero) digits is 512, while the sum is 24.

The square root of 20180481 is about 4492.2690257820. The cubic root of 20180481 is about 272.2558191924.

Adding to 20180481 its reverse (18408102), we get a palindrome (38588583).

The spelling of 20180481 in words is "twenty million, one hundred eighty thousand, four hundred eighty-one".