20203863326640 has 1680 divisors, whose sum is σ = 83820630636288. Its totient is φ = 4512628786176.

The previous prime is 20203863326609. The next prime is 20203863326641. The reversal of 20203863326640 is 4662336830202.

20203863326640 is a `hidden beast` number, since 2 + 0 + 2 + 0 + 3 + 8 + 633 + 2 + 6 + 6 + 4 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (1680).

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

It is not an unprimeable number, because it can be changed into a prime (20203863326641) by changing a digit.

It is a polite number, since it can be written in 335 ways as a sum of consecutive naturals, for example, 24430305907 + ... + 24430306733.

Almost surely, 2^{20203863326640} is an apocalyptic number.

20203863326640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20203863326640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41910315318144).

20203863326640 is an abundant number, since it is smaller than the sum of its proper divisors (63616767309648).

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

20203863326640 is a wasteful number, since it uses less digits than its factorization.

20203863326640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1058 (or 1030 counting only the distinct ones).

The product of its (nonzero) digits is 1492992, while the sum is 45.

The spelling of 20203863326640 in words is "twenty trillion, two hundred three billion, eight hundred sixty-three million, three hundred twenty-six thousand, six hundred forty".