20770000646 has 8 divisors (see below), whose sum is σ = 31476186840. Its totient is φ = 10277938368.

The previous prime is 20770000637. The next prime is 20770000649. The reversal of 20770000646 is 64600007702.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20770000649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53530736 + ... + 53531123.

It is an arithmetic number, because the mean of its divisors is an integer number (3934523355).

Almost surely, 2^20770000646 is an apocalyptic number.

20770000646 is a deficient number, since it is larger than the sum of its proper divisors (10706186194).

20770000646 is a wasteful number, since it uses less digits than its factorization.

20770000646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107061958.

The product of its (nonzero) digits is 14112, while the sum is 32.

The spelling of 20770000646 in words is "twenty billion, seven hundred seventy million, six hundred forty-six", and thus it is an aban number.