20649466 has 8 divisors (see below), whose sum is σ = 32604480. Its totient is φ = 9781308.

The previous prime is 20649451. The next prime is 20649481. The reversal of 20649466 is 66494602.

It is an interprime number because it is at equal distance from previous prime (20649451) and next prime (20649481).

It is a sphenic number, since it is the product of 3 distinct primes.

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, 271666 + ... + 271741.

It is an arithmetic number, because the mean of its divisors is an integer number (4075560).

Almost surely, 2^20649466 is an apocalyptic number.

20649466 is a deficient number, since it is larger than the sum of its proper divisors (11955014).

20649466 is a wasteful number, since it uses less digits than its factorization.

20649466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 543428.

The product of its (nonzero) digits is 62208, while the sum is 37.

The square root of 20649466 is about 4544.1683507546. The cubic root of 20649466 is about 274.3487221683.

It can be divided in two parts, 20649 and 466, that added together give a triangular number (21115 = T₂₀₅).

The spelling of 20649466 in words is "twenty million, six hundred forty-nine thousand, four hundred sixty-six".