20603081376 has 192 divisors, whose sum is σ = 63595929600. Its totient is φ = 6471187200.

The previous prime is 20603081341. The next prime is 20603081383. The reversal of 20603081376 is 67318030602.

It is a happy number.

20603081376 is a `hidden beast` number, since 206 + 0 + 3 + 0 + 81 + 376 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 20603081376.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3132171 + ... + 3138741.

It is an arithmetic number, because the mean of its divisors is an integer number (331228800).

Almost surely, 2^20603081376 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20603081376, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31797964800).

20603081376 is an abundant number, since it is smaller than the sum of its proper divisors (42992848224).

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

20603081376 is a wasteful number, since it uses less digits than its factorization.

20603081376 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6800 (or 6786 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

The spelling of 20603081376 in words is "twenty billion, six hundred three million, eighty-one thousand, three hundred seventy-six".