20785034 has 4 divisors (see below), whose sum is σ = 31177554. Its totient is φ = 10392516.

The previous prime is 20785019. The next prime is 20785043. The reversal of 20785034 is 43058702.

It is a happy number.

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., 20729809 + 55225 = 4553^2 + 235^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20784988 and 20785006.

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, 5196257 + ... + 5196260.

Almost surely, 2^20785034 is an apocalyptic number.

20785034 is a deficient number, since it is larger than the sum of its proper divisors (10392520).

20785034 is a wasteful number, since it uses less digits than its factorization.

20785034 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10392519.

The product of its (nonzero) digits is 6720, while the sum is 29.

The square root of 20785034 is about 4559.0606488618. The cubic root of 20785034 is about 274.9477983560.

The spelling of 20785034 in words is "twenty million, seven hundred eighty-five thousand, thirty-four".