20513054739696 has 160 divisors (see below), whose sum is σ = 57586179962880. Its totient is φ = 6268227379200.

The previous prime is 20513054739673. The next prime is 20513054739781. The reversal of 20513054739696 is 69693745031502.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 346047916 + ... + 346107188.

It is an arithmetic number, because the mean of its divisors is an integer number (359913624768).

Almost surely, 2^{20513054739696} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20513054739696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28793089981440).

20513054739696 is an abundant number, since it is smaller than the sum of its proper divisors (37073125223184).

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

20513054739696 is a wasteful number, since it uses less digits than its factorization.

20513054739696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71575 (or 71569 counting only the distinct ones).

The product of its (nonzero) digits is 36741600, while the sum is 60.

The spelling of 20513054739696 in words is "twenty trillion, five hundred thirteen billion, fifty-four million, seven hundred thirty-nine thousand, six hundred ninety-six".