20130132029978 has 24 divisors (see below), whose sum is σ = 30516440568372. Its totient is φ = 9959035955904.

The previous prime is 20130132029977. The next prime is 20130132030013. The reversal of 20130132029978 is 87992023103102.

It can be written as a sum of positive squares in 2 ways, for example, as 19531741597729 + 598390432249 = 4419473^2 + 773557^2 .

It is not an unprimeable number, because it can be changed into a prime (20130132029977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11195726 + ... + 12868742.

Almost surely, 2^{20130132029978} is an apocalyptic number.

20130132029978 is a deficient number, since it is larger than the sum of its proper divisors (10386308538394).

20130132029978 is a wasteful number, since it uses less digits than its factorization.

20130132029978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1673646 (or 1673519 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 47.

The spelling of 20130132029978 in words is "twenty trillion, one hundred thirty billion, one hundred thirty-two million, twenty-nine thousand, nine hundred seventy-eight".