20649622 has 16 divisors (see below), whose sum is σ = 35504640. Its totient is φ = 8823528.

The previous prime is 20649613. The next prime is 20649631. The reversal of 20649622 is 22694602.

It is an interprime number because it is at equal distance from previous prime (20649613) and next prime (20649631).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3129 + ... + 7147.

It is an arithmetic number, because the mean of its divisors is an integer number (2219040).

Almost surely, 2^20649622 is an apocalyptic number.

20649622 is a deficient number, since it is larger than the sum of its proper divisors (14855018).

20649622 is a wasteful number, since it uses less digits than its factorization.

20649622 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4395.

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 20649622 is about 4544.1855155792. The cubic root of 20649622 is about 274.3494130383.

The spelling of 20649622 in words is "twenty million, six hundred forty-nine thousand, six hundred twenty-two".