20993895483 has 32 divisors (see below), whose sum is σ = 31240581120. Its totient is φ = 12432828960.

The previous prime is 20993895463. The next prime is 20993895509. The reversal of 20993895483 is 38459839902.

It is not a de Polignac number, because 20993895483 - 2¹⁰ = 20993894459 is a prime.

It is a super-2 number, since 2×20993895483² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20993895463) 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 31 ways as a sum of consecutive naturals, for example, 292866 + ... + 357432.

It is an arithmetic number, because the mean of its divisors is an integer number (976268160).

Almost surely, 2^20993895483 is an apocalyptic number.

20993895483 is a deficient number, since it is larger than the sum of its proper divisors (10246685637).

20993895483 is a wasteful number, since it uses less digits than its factorization.

20993895483 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64807.

The product of its (nonzero) digits is 16796160, while the sum is 60.

The spelling of 20993895483 in words is "twenty billion, nine hundred ninety-three million, eight hundred ninety-five thousand, four hundred eighty-three".