20745377 has 8 divisors (see below), whose sum is σ = 21305856. Its totient is φ = 20189952.

The previous prime is 20745343. The next prime is 20745421. The reversal of 20745377 is 77354702.

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

It is a cyclic number.

It is not a de Polignac number, because 20745377 - 2¹⁴ = 20728993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20742377) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7928 + ... + 10214.

It is an arithmetic number, because the mean of its divisors is an integer number (2663232).

Almost surely, 2^20745377 is an apocalyptic number.

It is an amenable number.

20745377 is a deficient number, since it is larger than the sum of its proper divisors (560479).

20745377 is a wasteful number, since it uses less digits than its factorization.

20745377 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2527.

The product of its (nonzero) digits is 41160, while the sum is 35.

The square root of 20745377 is about 4554.7093211313. The cubic root of 20745377 is about 274.7728239530.

The spelling of 20745377 in words is "twenty million, seven hundred forty-five thousand, three hundred seventy-seven".