20061441680 has 80 divisors (see below), whose sum is σ = 55025716224. Its totient is φ = 6656325120.

The previous prime is 20061441677. The next prime is 20061441689. The reversal of 20061441680 is 8614416002.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×20061441680² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20061441689) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 560447 + ... + 595166.

Almost surely, 2^20061441680 is an apocalyptic number.

20061441680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20061441680 is an abundant number, since it is smaller than the sum of its proper divisors (34964274544).

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

20061441680 is a wasteful number, since it uses less digits than its factorization.

20061441680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1155664 (or 1155658 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 32.

Adding to 20061441680 its reverse (8614416002), we get a palindrome (28675857682).

The spelling of 20061441680 in words is "twenty billion, sixty-one million, four hundred forty-one thousand, six hundred eighty".