20294487898 has 24 divisors (see below), whose sum is σ = 32734509588. Its totient is φ = 9431779968.

The previous prime is 20294487853. The next prime is 20294487907. The reversal of 20294487898 is 89878449202.

It can be written as a sum of positive squares in 2 ways, for example, as 18574146369 + 1720341529 = 136287^2 + 41477^2 .

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 226911 + ... + 303442.

Almost surely, 2^20294487898 is an apocalyptic number.

20294487898 is a deficient number, since it is larger than the sum of its proper divisors (12440021690).

20294487898 is a wasteful number, since it uses less digits than its factorization.

20294487898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 530446 (or 530427 counting only the distinct ones).

The product of its (nonzero) digits is 18579456, while the sum is 61.

The spelling of 20294487898 in words is "twenty billion, two hundred ninety-four million, four hundred eighty-seven thousand, eight hundred ninety-eight".