20413481 has 16 divisors (see below), whose sum is σ = 23753088. Its totient is φ = 17337600.

The previous prime is 20413457. The next prime is 20413499. The reversal of 20413481 is 18431402.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20413481 is a prime.

It is a super-2 number, since 2×20413481² = 833420413074722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20413441) 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, 32036 + ... + 32666.

It is an arithmetic number, because the mean of its divisors is an integer number (1484568).

Almost surely, 2^20413481 is an apocalyptic number.

It is an amenable number.

20413481 is a deficient number, since it is larger than the sum of its proper divisors (3339607).

20413481 is a wasteful number, since it uses less digits than its factorization.

20413481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 832.

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 20413481 is about 4518.1280415677. The cubic root of 20413481 is about 273.2996169331.

Adding to 20413481 its reverse (18431402), we get a palindrome (38844883).

The spelling of 20413481 in words is "twenty million, four hundred thirteen thousand, four hundred eighty-one".