20489875198 has 16 divisors (see below), whose sum is σ = 33131490336. Its totient is φ = 9447590880.

The previous prime is 20489875183. The next prime is 20489875249. The reversal of 20489875198 is 89157898402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 359386 + ... + 412477.

It is an arithmetic number, because the mean of its divisors is an integer number (2070718146).

Almost surely, 2^20489875198 is an apocalyptic number.

20489875198 is a deficient number, since it is larger than the sum of its proper divisors (12641615138).

20489875198 is a wasteful number, since it uses less digits than its factorization.

20489875198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 772899.

The product of its (nonzero) digits is 11612160, while the sum is 61.

The spelling of 20489875198 in words is "twenty billion, four hundred eighty-nine million, eight hundred seventy-five thousand, one hundred ninety-eight".