20770651 has 16 divisors (see below), whose sum is σ = 24772608. Its totient is φ = 17193600.

The previous prime is 20770637. The next prime is 20770657. The reversal of 20770651 is 15607702.

It is a cyclic number.

It is not a de Polignac number, because 20770651 - 2⁵ = 20770619 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20770657) 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 15 ways as a sum of consecutive naturals, for example, 4006 + ... + 7588.

It is an arithmetic number, because the mean of its divisors is an integer number (1548288).

Almost surely, 2^20770651 is an apocalyptic number.

20770651 is a deficient number, since it is larger than the sum of its proper divisors (4001957).

20770651 is a wasteful number, since it uses less digits than its factorization.

20770651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3642.

The product of its (nonzero) digits is 2940, while the sum is 28.

The square root of 20770651 is about 4557.4829676039. The cubic root of 20770651 is about 274.8843635033.

The spelling of 20770651 in words is "twenty million, seven hundred seventy thousand, six hundred fifty-one".