134688020820 has 48 divisors (see below), whose sum is σ = 377152977600. Its totient is φ = 35914279936.

The previous prime is 134688020791. The next prime is 134688020867. The reversal of 134688020820 is 28020886431.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 877156 + ... + 1019204.

It is an arithmetic number, because the mean of its divisors is an integer number (7857353700).

Almost surely, 2^134688020820 is an apocalyptic number.

134688020820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

134688020820 is an abundant number, since it is smaller than the sum of its proper divisors (242464956780).

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

134688020820 is a wasteful number, since it uses less digits than its factorization.

134688020820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157864 (or 157862 counting only the distinct ones).

The product of its (nonzero) digits is 147456, while the sum is 42.

The spelling of 134688020820 in words is "one hundred thirty-four billion, six hundred eighty-eight million, twenty thousand, eight hundred twenty".