20741668 has 6 divisors (see below), whose sum is σ = 36297926. Its totient is φ = 10370832.

The previous prime is 20741621. The next prime is 20741713. The reversal of 20741668 is 86614702.

It can be written as a sum of positive squares in only one way, i.e., 18045504 + 2696164 = 4248^2 + 1642^2 .

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 as a sum of consecutive naturals, namely, 2592705 + ... + 2592712.

Almost surely, 2^20741668 is an apocalyptic number.

It is an amenable number.

20741668 is a deficient number, since it is larger than the sum of its proper divisors (15556258).

20741668 is a wasteful number, since it uses less digits than its factorization.

20741668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5185421 (or 5185419 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 20741668 is about 4554.3021419313. The cubic root of 20741668 is about 274.7564477238.

The spelling of 20741668 in words is "twenty million, seven hundred forty-one thousand, six hundred sixty-eight".