20261306773457 has 8 divisors (see below), whose sum is σ = 20462800740672. Its totient is φ = 20059830198000.

The previous prime is 20261306773439. The next prime is 20261306773471. The reversal of 20261306773457 is 75437760316202.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20261306773457 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20261306773399 and 20261306773408.

It is not an unprimeable number, because it can be changed into a prime (20261306770457) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2000093 + ... + 6672554.

It is an arithmetic number, because the mean of its divisors is an integer number (2557850092584).

Almost surely, 2^{20261306773457} is an apocalyptic number.

It is an amenable number.

20261306773457 is a deficient number, since it is larger than the sum of its proper divisors (201493967215).

20261306773457 is a wasteful number, since it uses less digits than its factorization.

20261306773457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8695879.

The product of its (nonzero) digits is 8890560, while the sum is 53.

The spelling of 20261306773457 in words is "twenty trillion, two hundred sixty-one billion, three hundred six million, seven hundred seventy-three thousand, four hundred fifty-seven".