20613136898874 has 128 divisors (see below), whose sum is σ = 48244292490240. Its totient is φ = 5817011106816.

The previous prime is 20613136898839. The next prime is 20613136898911. The reversal of 20613136898874 is 47889863131602.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 5769777 + ... + 8632299.

It is an arithmetic number, because the mean of its divisors is an integer number (376908535080).

Almost surely, 2^{20613136898874} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20613136898874, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24122146245120).

20613136898874 is an abundant number, since it is smaller than the sum of its proper divisors (27631155591366).

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

20613136898874 is a wasteful number, since it uses less digits than its factorization.

20613136898874 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2862716.

The product of its (nonzero) digits is 83607552, while the sum is 66.

The spelling of 20613136898874 in words is "twenty trillion, six hundred thirteen billion, one hundred thirty-six million, eight hundred ninety-eight thousand, eight hundred seventy-four".