20755466820 has 72 divisors (see below), whose sum is σ = 68681733120. Its totient is φ = 5031627840.

The previous prime is 20755466813. The next prime is 20755466833. The reversal of 20755466820 is 2866455702.

20755466820 is a `hidden beast` number, since 20 + 7 + 5 + 546 + 6 + 82 + 0 = 666.

It is a super-2 number, since 2×20755466820² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5239300 + ... + 5243259.

It is an arithmetic number, because the mean of its divisors is an integer number (953912960).

Almost surely, 2^20755466820 is an apocalyptic number.

20755466820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20755466820 is an abundant number, since it is smaller than the sum of its proper divisors (47926266300).

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

20755466820 is a wasteful number, since it uses less digits than its factorization.

20755466820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10482585 (or 10482580 counting only the distinct ones).

The product of its (nonzero) digits is 806400, while the sum is 45.

The spelling of 20755466820 in words is "twenty billion, seven hundred fifty-five million, four hundred sixty-six thousand, eight hundred twenty".