20198257082 has 4 divisors (see below), whose sum is σ = 30297385626. Its totient is φ = 10099128540.

The previous prime is 20198257061. The next prime is 20198257091. The reversal of 20198257082 is 28075289102.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 14577906121 + 5620350961 = 120739^2 + 74969^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5049564269 + ... + 5049564272.

Almost surely, 2^20198257082 is an apocalyptic number.

20198257082 is a deficient number, since it is larger than the sum of its proper divisors (10099128544).

20198257082 is a wasteful number, since it uses less digits than its factorization.

20198257082 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10099128543.

The product of its (nonzero) digits is 161280, while the sum is 44.

The spelling of 20198257082 in words is "twenty billion, one hundred ninety-eight million, two hundred fifty-seven thousand, eighty-two".