20481461 has 48 divisors (see below), whose sum is σ = 29111040. Its totient is φ = 14152320.

The previous prime is 20481451. The next prime is 20481463. The reversal of 20481461 is 16418402.

20481461 = 140³ + 141³ + ... + 146³.

It is not a de Polignac number, because 20481461 - 2⁶ = 20481397 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 20481461.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20481463) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 259220 + ... + 259298.

It is an arithmetic number, because the mean of its divisors is an integer number (606480).

Almost surely, 2^20481461 is an apocalyptic number.

It is an amenable number.

20481461 is a deficient number, since it is larger than the sum of its proper divisors (8629579).

20481461 is a wasteful number, since it uses less digits than its factorization.

20481461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154 (or 147 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 26.

The square root of 20481461 is about 4525.6448159351. The cubic root of 20481461 is about 273.6026572377.

Adding to 20481461 its reverse (16418402), we get a palindrome (36899863).

The spelling of 20481461 in words is "twenty million, four hundred eighty-one thousand, four hundred sixty-one".