20703021677 has 8 divisors (see below), whose sum is σ = 22296829464. Its totient is φ = 19109395008.

The previous prime is 20703021667. The next prime is 20703021797. The reversal of 20703021677 is 77612030702.

It can be written as a sum of positive squares in 4 ways, for example, as 129709321 + 20573312356 = 11389^2 + 143434^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 20703021677 - 2¹² = 20703017581 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20703021667) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 277283 + ... + 343935.

It is an arithmetic number, because the mean of its divisors is an integer number (2787103683).

Almost surely, 2^20703021677 is an apocalyptic number.

It is an amenable number.

20703021677 is a deficient number, since it is larger than the sum of its proper divisors (1593807787).

20703021677 is a wasteful number, since it uses less digits than its factorization.

20703021677 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90559.

The product of its (nonzero) digits is 24696, while the sum is 35.

The spelling of 20703021677 in words is "twenty billion, seven hundred three million, twenty-one thousand, six hundred seventy-seven".