20780714 has 4 divisors (see below), whose sum is σ = 31171074. Its totient is φ = 10390356.

The previous prime is 20780689. The next prime is 20780729. The reversal of 20780714 is 41708702.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 16265089 + 4515625 = 4033^2 + 2125^2 .

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, 5195177 + ... + 5195180.

Almost surely, 2^20780714 is an apocalyptic number.

20780714 is a deficient number, since it is larger than the sum of its proper divisors (10390360).

20780714 is a wasteful number, since it uses less digits than its factorization.

20780714 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10390359.

The product of its (nonzero) digits is 3136, while the sum is 29.

The square root of 20780714 is about 4558.5868424326. The cubic root of 20780714 is about 274.9287484827.

The spelling of 20780714 in words is "twenty million, seven hundred eighty thousand, seven hundred fourteen".