20770366 has 4 divisors (see below), whose sum is σ = 31155552. Its totient is φ = 10385182.

The previous prime is 20770361. The next prime is 20770397. The reversal of 20770366 is 66307702.

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

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20770361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5192590 + ... + 5192593.

It is an arithmetic number, because the mean of its divisors is an integer number (7788888).

Almost surely, 2^20770366 is an apocalyptic number.

20770366 is a deficient number, since it is larger than the sum of its proper divisors (10385186).

20770366 is a wasteful number, since it uses less digits than its factorization.

20770366 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10385185.

The product of its (nonzero) digits is 10584, while the sum is 31.

The square root of 20770366 is about 4557.4517002378. The cubic root of 20770366 is about 274.8831062421.

The spelling of 20770366 in words is "twenty million, seven hundred seventy thousand, three hundred sixty-six".