20769758 has 4 divisors (see below), whose sum is σ = 31154640. Its totient is φ = 10384878.

The previous prime is 20769757. The next prime is 20769779. The reversal of 20769758 is 85796702.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 85796702 = 2 ⋅42898351.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20769751) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5192438 + ... + 5192441.

It is an arithmetic number, because the mean of its divisors is an integer number (7788660).

Almost surely, 2^20769758 is an apocalyptic number.

20769758 is a deficient number, since it is larger than the sum of its proper divisors (10384882).

20769758 is a wasteful number, since it uses less digits than its factorization.

20769758 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10384881.

The product of its (nonzero) digits is 211680, while the sum is 44.

The square root of 20769758 is about 4557.3849958063. The cubic root of 20769758 is about 274.8804240464.

The spelling of 20769758 in words is "twenty million, seven hundred sixty-nine thousand, seven hundred fifty-eight".