20890880158 has 8 divisors (see below), whose sum is σ = 31414466880. Its totient is φ = 10419391200.

The previous prime is 20890880147. The next prime is 20890880207. The reversal of 20890880158 is 85108809802.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13023438 + ... + 13025041.

It is an arithmetic number, because the mean of its divisors is an integer number (3926808360).

Almost surely, 2^20890880158 is an apocalyptic number.

20890880158 is a deficient number, since it is larger than the sum of its proper divisors (10523586722).

20890880158 is a wasteful number, since it uses less digits than its factorization.

20890880158 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26048882.

The product of its (nonzero) digits is 368640, while the sum is 49.

The spelling of 20890880158 in words is "twenty billion, eight hundred ninety million, eight hundred eighty thousand, one hundred fifty-eight".