20261306773456 has 160 divisors (see below), whose sum is σ = 48068880537600. Its totient is φ = 8080363630080.

The previous prime is 20261306773439. The next prime is 20261306773471. The reversal of 20261306773456 is 65437760316202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 40393411 + ... + 40891933.

It is an arithmetic number, because the mean of its divisors is an integer number (300430503360).

Almost surely, 2^{20261306773456} 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 20261306773456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24034440268800).

20261306773456 is an abundant number, since it is smaller than the sum of its proper divisors (27807573764144).

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

20261306773456 is a wasteful number, since it uses less digits than its factorization.

20261306773456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 498897 (or 498891 counting only the distinct ones).

The product of its (nonzero) digits is 7620480, while the sum is 52.

The spelling of 20261306773456 in words is "twenty trillion, two hundred sixty-one billion, three hundred six million, seven hundred seventy-three thousand, four hundred fifty-six".