100020381778332 has 36 divisors (see below), whose sum is σ = 252931783123656. Its totient is φ = 33326612788320.

The previous prime is 100020381778327. The next prime is 100020381778333. The reversal of 100020381778332 is 233877183020001.

It is a happy number.

100020381778332 is a `hidden beast` number, since 100 + 0 + 20 + 381 + 77 + 83 + 3 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100020381778333) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 563012919 + ... + 563190542.

It is an arithmetic number, because the mean of its divisors is an integer number (7025882864546).

Almost surely, 2^{100020381778332} is an apocalyptic number.

100020381778332 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

100020381778332 is an abundant number, since it is smaller than the sum of its proper divisors (152911401345324).

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

100020381778332 is a wasteful number, since it uses less digits than its factorization.

100020381778332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1126205938 (or 1126205933 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 45.

The spelling of 100020381778332 in words is "one hundred trillion, twenty billion, three hundred eighty-one million, seven hundred seventy-eight thousand, three hundred thirty-two".