20802542481 has 48 divisors (see below), whose sum is σ = 34669514880. Its totient is φ = 11773762560.

The previous prime is 20802542477. The next prime is 20802542641. The reversal of 20802542481 is 18424520802.

20802542481 is a `hidden beast` number, since 208 + 0 + 25 + 424 + 8 + 1 = 666.

It is not a de Polignac number, because 20802542481 - 2² = 20802542477 is a prime.

It is a super-2 number, since 2×20802542481² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20802542381) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4034401 + ... + 4039553.

It is an arithmetic number, because the mean of its divisors is an integer number (722281560).

Almost surely, 2^20802542481 is an apocalyptic number.

20802542481 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

20802542481 is a deficient number, since it is larger than the sum of its proper divisors (13866972399).

20802542481 is a wasteful number, since it uses less digits than its factorization.

20802542481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5766 (or 5763 counting only the distinct ones).

The product of its (nonzero) digits is 40960, while the sum is 36.

The spelling of 20802542481 in words is "twenty billion, eight hundred two million, five hundred forty-two thousand, four hundred eighty-one".