20706651520 has 64 divisors (see below), whose sum is σ = 49956152400. Its totient is φ = 8206645248.

The previous prime is 20706651499. The next prime is 20706651529. The reversal of 20706651520 is 2515660702.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20706651529) 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, 78654 + ... + 218173.

Almost surely, 2^20706651520 is an apocalyptic number.

20706651520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20706651520 is an abundant number, since it is smaller than the sum of its proper divisors (29249500880).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20706651520 is a wasteful number, since it uses less digits than its factorization.

20706651520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 296955 (or 296943 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 34.

The spelling of 20706651520 in words is "twenty billion, seven hundred six million, six hundred fifty-one thousand, five hundred twenty".