20966335040 has 56 divisors (see below), whose sum is σ = 57058389312. Its totient is φ = 7188456960.

The previous prime is 20966335021. The next prime is 20966335067. The reversal of 20966335040 is 4053366902.

It is a tau number, because it is divible by the number of its divisors (56).

It is a junction number, because it is equal to n+sod(n) for n = 20966334985 and 20966335003.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4677746 + ... + 4682225.

Almost surely, 2^20966335040 is an apocalyptic number.

20966335040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20966335040 is an abundant number, since it is smaller than the sum of its proper divisors (36092054272).

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

20966335040 is an equidigital number, since it uses as much as digits as its factorization.

20966335040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9359995 (or 9359985 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 38.

The spelling of 20966335040 in words is "twenty billion, nine hundred sixty-six million, three hundred thirty-five thousand, forty".