20953394403600 has 120 divisors (see below), whose sum is σ = 67633079054112. Its totient is φ = 5544918579200.

The previous prime is 20953394403569. The next prime is 20953394403647. The reversal of 20953394403600 is 630449335902.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 20953394403600.

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 23 ways as a sum of consecutive naturals, for example, 66488457 + ... + 66802856.

Almost surely, 2^{20953394403600} is an apocalyptic number.

20953394403600 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20953394403600 is an abundant number, since it is smaller than the sum of its proper divisors (46679684650512).

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

20953394403600 is a wasteful number, since it uses less digits than its factorization.

20953394403600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133291465 (or 133291454 counting only the distinct ones).

The product of its (nonzero) digits is 2099520, while the sum is 48.

The spelling of 20953394403600 in words is "twenty trillion, nine hundred fifty-three billion, three hundred ninety-four million, four hundred three thousand, six hundred".