20660514240 has 56 divisors (see below), whose sum is σ = 65597135760. Its totient is φ = 5509470208.

The previous prime is 20660514233. The next prime is 20660514241. The reversal of 20660514240 is 4241506602.

It is a super-2 number, since 2×20660514240² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 20660514198 and 20660514207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20660514241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10759725 + ... + 10761644.

Almost surely, 2^20660514240 is an apocalyptic number.

20660514240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20660514240 is an abundant number, since it is smaller than the sum of its proper divisors (44936621520).

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

20660514240 is a wasteful number, since it uses less digits than its factorization.

20660514240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21521389 (or 21521379 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 30.

The spelling of 20660514240 in words is "twenty billion, six hundred sixty million, five hundred fourteen thousand, two hundred forty".