20401461 has 6 divisors (see below), whose sum is σ = 29468790. Its totient is φ = 13600968.

The previous prime is 20401457. The next prime is 20401463. The reversal of 20401461 is 16410402.

20401461 is a `hidden beast` number, since 204 + 0 + 1 + 461 = 666.

It can be written as a sum of positive squares in only one way, i.e., 19580625 + 820836 = 4425^2 + 906^2 .

It is not a de Polignac number, because 20401461 - 2² = 20401457 is a prime.

It is a super-2 number, since 2×20401461² = 832439221869042, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20401463) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1133406 + ... + 1133423.

It is an arithmetic number, because the mean of its divisors is an integer number (4911465).

Almost surely, 2^20401461 is an apocalyptic number.

It is an amenable number.

20401461 is a deficient number, since it is larger than the sum of its proper divisors (9067329).

20401461 is a wasteful number, since it uses less digits than its factorization.

20401461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2266835 (or 2266832 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 20401461 is about 4516.7976487773. The cubic root of 20401461 is about 273.2459643757.

Adding to 20401461 its reverse (16410402), we get a palindrome (36811863).

The spelling of 20401461 in words is "twenty million, four hundred one thousand, four hundred sixty-one".