20477839706 has 8 divisors (see below), whose sum is σ = 30720097044. Its totient is φ = 10237807360.

The previous prime is 20477839693. The next prime is 20477839717. The reversal of 20477839706 is 60793877402.

It can be written as a sum of positive squares in 2 ways, for example, as 20451574081 + 26265625 = 143009^2 + 5125^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 533045 + ... + 570168.

Almost surely, 2^20477839706 is an apocalyptic number.

20477839706 is a deficient number, since it is larger than the sum of its proper divisors (10242257338).

20477839706 is a wasteful number, since it uses less digits than its factorization.

20477839706 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1112496.

The product of its (nonzero) digits is 3556224, while the sum is 53.

The spelling of 20477839706 in words is "twenty billion, four hundred seventy-seven million, eight hundred thirty-nine thousand, seven hundred six".