20290461 has 16 divisors (see below), whose sum is σ = 29399040. Its totient is φ = 12400560.

The previous prime is 20290447. The next prime is 20290463. The reversal of 20290461 is 16409202.

It is not a de Polignac number, because 20290461 - 2⁶ = 20290397 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20290463) 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, 3975 + ... + 7508.

It is an arithmetic number, because the mean of its divisors is an integer number (1837440).

Almost surely, 2^20290461 is an apocalyptic number.

It is an amenable number.

20290461 is a deficient number, since it is larger than the sum of its proper divisors (9108579).

20290461 is a wasteful number, since it uses less digits than its factorization.

20290461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11536.

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 20290461 is about 4504.4934232386. The cubic root of 20290461 is about 272.7495052280.

Adding to 20290461 its reverse (16409202), we get a palindrome (36699663).

The spelling of 20290461 in words is "twenty million, two hundred ninety thousand, four hundred sixty-one".