20261364240636 has 144 divisors (see below), whose sum is σ = 51521219961120. Its totient is φ = 6713729003520.

The previous prime is 20261364240569. The next prime is 20261364240641. The reversal of 20261364240636 is 63604246316202.

20261364240636 is a `hidden beast` number, since 2 + 0 + 2 + 6 + 1 + 3 + 6 + 4 + 2 + 4 + 0 + 636 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 20261364240591 and 20261364240600.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6559196980 + ... + 6559200068.

It is an arithmetic number, because the mean of its divisors is an integer number (357786249730).

Almost surely, 2^{20261364240636} is an apocalyptic number.

It is an amenable number.

20261364240636 is an abundant number, since it is smaller than the sum of its proper divisors (31259855720484).

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

20261364240636 is a wasteful number, since it uses less digits than its factorization.

20261364240636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4924 (or 4919 counting only the distinct ones).

The product of its (nonzero) digits is 1492992, while the sum is 45.

The spelling of 20261364240636 in words is "twenty trillion, two hundred sixty-one billion, three hundred sixty-four million, two hundred forty thousand, six hundred thirty-six".