20413465 has 4 divisors (see below), whose sum is σ = 24496164. Its totient is φ = 16330768.

The previous prime is 20413457. The next prime is 20413499. The reversal of 20413465 is 56431402.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 56431402 = 2 ⋅28215701.

It can be written as a sum of positive squares in 2 ways, for example, as 8928144 + 11485321 = 2988^2 + 3389^2 .

It is a cyclic number.

It is not a de Polignac number, because 20413465 - 2³ = 20413457 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2041342 + ... + 2041351.

It is an arithmetic number, because the mean of its divisors is an integer number (6124041).

Almost surely, 2^20413465 is an apocalyptic number.

It is an amenable number.

20413465 is a deficient number, since it is larger than the sum of its proper divisors (4082699).

20413465 is an equidigital number, since it uses as much as digits as its factorization.

20413465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4082698.

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 20413465 is about 4518.1262709225. The cubic root of 20413465 is about 273.2995455294.

Adding to 20413465 its reverse (56431402), we get a palindrome (76844867).

The spelling of 20413465 in words is "twenty million, four hundred thirteen thousand, four hundred sixty-five".