20995353708 has 24 divisors (see below), whose sum is σ = 55987610112. Its totient is φ = 5998672464.

The previous prime is 20995353671. The next prime is 20995353721. The reversal of 20995353708 is 80735359902.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 124972260 + ... + 124972427.

It is an arithmetic number, because the mean of its divisors is an integer number (2332817088).

Almost surely, 2^20995353708 is an apocalyptic number.

20995353708 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

20995353708 is an abundant number, since it is smaller than the sum of its proper divisors (34992256404).

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

20995353708 is a wasteful number, since it uses less digits than its factorization.

20995353708 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249944701 (or 249944699 counting only the distinct ones).

The product of its (nonzero) digits is 2041200, while the sum is 51.

The spelling of 20995353708 in words is "twenty billion, nine hundred ninety-five million, three hundred fifty-three thousand, seven hundred eight".