20330649 has 32 divisors (see below), whose sum is σ = 31664640. Its totient is φ = 12877056.

The previous prime is 20330647. The next prime is 20330671. The reversal of 20330649 is 94603302.

It is not a de Polignac number, because 20330649 - 2¹ = 20330647 is a prime.

It is a super-2 number, since 2×20330649² = 826670577522402, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (20330647) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 46737 + ... + 47169.

It is an arithmetic number, because the mean of its divisors is an integer number (989520).

Almost surely, 2^20330649 is an apocalyptic number.

It is an amenable number.

20330649 is a deficient number, since it is larger than the sum of its proper divisors (11333991).

20330649 is a wasteful number, since it uses less digits than its factorization.

20330649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 526 (or 520 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 27.

The square root of 20330649 is about 4508.9520955539. The cubic root of 20330649 is about 272.9294588906.

The spelling of 20330649 in words is "twenty million, three hundred thirty thousand, six hundred forty-nine".