20770746 has 8 divisors (see below), whose sum is σ = 41541504. Its totient is φ = 6923580.

The previous prime is 20770741. The next prime is 20770747. The reversal of 20770746 is 64707702.

It is a happy number.

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

20770746 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (20770741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1730890 + ... + 1730901.

It is an arithmetic number, because the mean of its divisors is an integer number (5192688).

Almost surely, 2^20770746 is an apocalyptic number.

20770746 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.

20770746 is a wasteful number, since it uses less digits than its factorization.

20770746 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3461796.

The product of its (nonzero) digits is 16464, while the sum is 33.

The square root of 20770746 is about 4557.4933900117. The cubic root of 20770746 is about 274.8847825878.

The spelling of 20770746 in words is "twenty million, seven hundred seventy thousand, seven hundred forty-six".