20105004398 has 16 divisors (see below), whose sum is σ = 31521812256. Its totient is φ = 9599208960.

The previous prime is 20105004383. The next prime is 20105004419. The reversal of 20105004398 is 89340050102.

It is a super-2 number, since 2×20105004398² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 341243 + ... + 395798.

It is an arithmetic number, because the mean of its divisors is an integer number (1970113266).

Almost surely, 2^20105004398 is an apocalyptic number.

20105004398 is a deficient number, since it is larger than the sum of its proper divisors (11416807858).

20105004398 is a wasteful number, since it uses less digits than its factorization.

20105004398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 737659.

The product of its (nonzero) digits is 8640, while the sum is 32.

The spelling of 20105004398 in words is "twenty billion, one hundred five million, four thousand, three hundred ninety-eight".