20601615770 has 16 divisors (see below), whose sum is σ = 37125208008. Its totient is φ = 8231246400.

The previous prime is 20601615751. The next prime is 20601615787. The reversal of 20601615770 is 7751610602.

It can be written as a sum of positive squares in 4 ways, for example, as 20449858009 + 151757761 = 143003^2 + 12319^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20601615770.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1165781 + ... + 1183320.

Almost surely, 2^20601615770 is an apocalyptic number.

20601615770 is a deficient number, since it is larger than the sum of its proper divisors (16523592238).

20601615770 is a wasteful number, since it uses less digits than its factorization.

20601615770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2349985.

The product of its (nonzero) digits is 17640, while the sum is 35.

The spelling of 20601615770 in words is "twenty billion, six hundred one million, six hundred fifteen thousand, seven hundred seventy".