20761278 has 8 divisors (see below), whose sum is σ = 41522568. Its totient is φ = 6920424.

The previous prime is 20761271. The next prime is 20761291. The reversal of 20761278 is 87216702.

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

20761278 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20761271) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1730101 + ... + 1730112.

It is an arithmetic number, because the mean of its divisors is an integer number (5190321).

Almost surely, 2^20761278 is an apocalyptic number.

20761278 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20761278 is a wasteful number, since it uses less digits than its factorization.

20761278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3460218.

The product of its (nonzero) digits is 9408, while the sum is 33.

The square root of 20761278 is about 4556.4545427339. The cubic root of 20761278 is about 274.8430090172.

It can be divided in two parts, 207612 and 78, that added together give a triangular number (207690 = T₆₄₄).

The spelling of 20761278 in words is "twenty million, seven hundred sixty-one thousand, two hundred seventy-eight".