20912356134912 has 104 divisors (see below), whose sum is σ = 60828519250080. Its totient is φ = 6337077575680.

The previous prime is 20912356134911. The next prime is 20912356134947. The reversal of 20912356134912 is 21943165321902.

It is a super-2 number, since 2×20912356134912² (a number of 27 digits) contains 22 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (20912356134911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77221737 + ... + 77492072.

Almost surely, 2^{20912356134912} is an apocalyptic number.

20912356134912 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

20912356134912 is an abundant number, since it is smaller than the sum of its proper divisors (39916163115168).

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

20912356134912 is a wasteful number, since it uses less digits than its factorization.

20912356134912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154713847 (or 154713825 counting only the distinct ones).

The product of its (nonzero) digits is 699840, while the sum is 48.

The spelling of 20912356134912 in words is "twenty trillion, nine hundred twelve billion, three hundred fifty-six million, one hundred thirty-four thousand, nine hundred twelve".