20627465 has 4 divisors (see below), whose sum is σ = 24752964. Its totient is φ = 16501968.

The previous prime is 20627449. The next prime is 20627471. The reversal of 20627465 is 56472602.

20627465 = 3211² + 3212².

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 10316944 + 10310521 = 3212^2 + 3211^2 .

It is a cyclic number.

It is not a de Polignac number, because 20627465 - 2⁴ = 20627449 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, 2062742 + ... + 2062751.

It is an arithmetic number, because the mean of its divisors is an integer number (6188241).

Almost surely, 2^20627465 is an apocalyptic number.

20627465 is the 3212-nd centered square number.

It is an amenable number.

20627465 is a deficient number, since it is larger than the sum of its proper divisors (4125499).

20627465 is an equidigital number, since it uses as much as digits as its factorization.

20627465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4125498.

The product of its (nonzero) digits is 20160, while the sum is 32.

The square root of 20627465 is about 4541.7469106061. The cubic root of 20627465 is about 274.2512524778.

The spelling of 20627465 in words is "twenty million, six hundred twenty-seven thousand, four hundred sixty-five".