20254420281687 has 8 divisors (see below), whose sum is σ = 28180063000704. Its totient is φ = 12915862208568.

The previous prime is 20254420281643. The next prime is 20254420281707. The reversal of 20254420281687 is 78618202445202.

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

It is not a de Polignac number, because 20254420281687 - 2¹⁵ = 20254420248919 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20254420281607) 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, 146771161393 + ... + 146771161530.

It is an arithmetic number, because the mean of its divisors is an integer number (3522507875088).

Almost surely, 2^{20254420281687} is an apocalyptic number.

20254420281687 is a deficient number, since it is larger than the sum of its proper divisors (7925642719017).

20254420281687 is a wasteful number, since it uses less digits than its factorization.

20254420281687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 293542322949.

The product of its (nonzero) digits is 3440640, while the sum is 51.

The spelling of 20254420281687 in words is "twenty trillion, two hundred fifty-four billion, four hundred twenty million, two hundred eighty-one thousand, six hundred eighty-seven".