20157286641 has 8 divisors (see below), whose sum is σ = 28044920640. Its totient is φ = 12853921872.

The previous prime is 20157286609. The next prime is 20157286661. The reversal of 20157286641 is 14668275102.

It is a happy number.

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

It is not a de Polignac number, because 20157286641 - 2⁵ = 20157286609 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20157286593 and 20157286602.

It is not an unprimeable number, because it can be changed into a prime (20157286661) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 146067226 + ... + 146067363.

It is an arithmetic number, because the mean of its divisors is an integer number (3505615080).

Almost surely, 2^20157286641 is an apocalyptic number.

It is an amenable number.

20157286641 is a deficient number, since it is larger than the sum of its proper divisors (7887633999).

20157286641 is a wasteful number, since it uses less digits than its factorization.

20157286641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 292134615.

The product of its (nonzero) digits is 161280, while the sum is 42.

The spelling of 20157286641 in words is "twenty billion, one hundred fifty-seven million, two hundred eighty-six thousand, six hundred forty-one".