20675009398 has 4 divisors (see below), whose sum is σ = 31012514100. Its totient is φ = 10337504698.

The previous prime is 20675009339. The next prime is 20675009413. The reversal of 20675009398 is 89390057602.

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

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5168752348 + ... + 5168752351.

It is an arithmetic number, because the mean of its divisors is an integer number (7753128525).

Almost surely, 2^20675009398 is an apocalyptic number.

20675009398 is a deficient number, since it is larger than the sum of its proper divisors (10337504702).

20675009398 is a wasteful number, since it uses less digits than its factorization.

20675009398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10337504701.

The product of its (nonzero) digits is 816480, while the sum is 49.

The spelling of 20675009398 in words is "twenty billion, six hundred seventy-five million, nine thousand, three hundred ninety-eight".