20770605 has 12 divisors (see below), whose sum is σ = 36002460. Its totient is φ = 11077632.

The previous prime is 20770573. The next prime is 20770609. The reversal of 20770605 is 50607702.

It can be written as a sum of positive squares in 2 ways, for example, as 7767369 + 13003236 = 2787^2 + 3606^2 .

It is not a de Polignac number, because 20770605 - 2⁵ = 20770573 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20770609) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 230740 + ... + 230829.

It is an arithmetic number, because the mean of its divisors is an integer number (3000205).

Almost surely, 2^20770605 is an apocalyptic number.

It is an amenable number.

20770605 is a deficient number, since it is larger than the sum of its proper divisors (15231855).

20770605 is a wasteful number, since it uses less digits than its factorization.

20770605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 461580 (or 461577 counting only the distinct ones).

The product of its (nonzero) digits is 2940, while the sum is 27.

The square root of 20770605 is about 4557.4779209558. The cubic root of 20770605 is about 274.8841605777.

The spelling of 20770605 in words is "twenty million, seven hundred seventy thousand, six hundred five".