20465461 has 4 divisors (see below), whose sum is σ = 20695500. Its totient is φ = 20235424.

The previous prime is 20465449. The next prime is 20465491. The reversal of 20465461 is 16456402.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16456402 = 2 ⋅8228201.

It can be written as a sum of positive squares in 2 ways, for example, as 4704561 + 15760900 = 2169^2 + 3970^2 .

It is a cyclic number.

It is not a de Polignac number, because 20465461 - 2⁵ = 20465429 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 (20465411) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 114886 + ... + 115063.

It is an arithmetic number, because the mean of its divisors is an integer number (5173875).

Almost surely, 2^20465461 is an apocalyptic number.

It is an amenable number.

20465461 is a deficient number, since it is larger than the sum of its proper divisors (230039).

20465461 is an equidigital number, since it uses as much as digits as its factorization.

20465461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230038.

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 20465461 is about 4523.8767666682. The cubic root of 20465461 is about 273.5313930679.

The spelling of 20465461 in words is "twenty million, four hundred sixty-five thousand, four hundred sixty-one".