20935465 has 4 divisors (see below), whose sum is σ = 25122564. Its totient is φ = 16748368.

The previous prime is 20935459. The next prime is 20935487. The reversal of 20935465 is 56453902.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9753129 + 11182336 = 3123^2 + 3344^2 .

It is a cyclic number.

It is not a de Polignac number, because 20935465 - 2³ = 20935457 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20935465.

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, 2093542 + ... + 2093551.

It is an arithmetic number, because the mean of its divisors is an integer number (6280641).

Almost surely, 2^20935465 is an apocalyptic number.

It is an amenable number.

20935465 is a deficient number, since it is larger than the sum of its proper divisors (4187099).

20935465 is an equidigital number, since it uses as much as digits as its factorization.

20935465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4187098.

The product of its (nonzero) digits is 32400, while the sum is 34.

The square root of 20935465 is about 4575.5289311729. The cubic root of 20935465 is about 275.6095130841.

The spelling of 20935465 in words is "twenty million, nine hundred thirty-five thousand, four hundred sixty-five".