20898504194 has 4 divisors (see below), whose sum is σ = 31347756294. Its totient is φ = 10449252096.

The previous prime is 20898504157. The next prime is 20898504199. The reversal of 20898504194 is 49140589802.

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., 13592528569 + 7305975625 = 116587^2 + 85475^2 .

It is not an unprimeable number, because it can be changed into a prime (20898504199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5224626047 + ... + 5224626050.

Almost surely, 2^20898504194 is an apocalyptic number.

20898504194 is a deficient number, since it is larger than the sum of its proper divisors (10449252100).

20898504194 is a wasteful number, since it uses less digits than its factorization.

20898504194 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10449252099.

The product of its (nonzero) digits is 829440, while the sum is 50.

The spelling of 20898504194 in words is "twenty billion, eight hundred ninety-eight million, five hundred four thousand, one hundred ninety-four".