20910461 has 32 divisors (see below), whose sum is σ = 26127360. Its totient is φ = 16473600.

The previous prime is 20910457. The next prime is 20910467. The reversal of 20910461 is 16401902.

It is a happy number.

It is not a de Polignac number, because 20910461 - 2² = 20910457 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20910467) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 234905 + ... + 234993.

It is an arithmetic number, because the mean of its divisors is an integer number (816480).

Almost surely, 2^20910461 is an apocalyptic number.

It is an amenable number.

20910461 is a deficient number, since it is larger than the sum of its proper divisors (5216899).

20910461 is a wasteful number, since it uses less digits than its factorization.

20910461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 20910461 is about 4572.7957531471. The cubic root of 20910461 is about 275.4997458284.

The spelling of 20910461 in words is "twenty million, nine hundred ten thousand, four hundred sixty-one".