20399198594 has 32 divisors (see below), whose sum is σ = 32702123520. Its totient is φ = 9521155072.

The previous prime is 20399198587. The next prime is 20399198629. The reversal of 20399198594 is 49589199302.

It is a super-2 number, since 2×20399198594² (a number of 21 digits) contains 22 as substring.

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 15 ways as a sum of consecutive naturals, for example, 749822 + ... + 776550.

It is an arithmetic number, because the mean of its divisors is an integer number (1021941360).

Almost surely, 2^20399198594 is an apocalyptic number.

20399198594 is a deficient number, since it is larger than the sum of its proper divisors (12302924926).

20399198594 is a wasteful number, since it uses less digits than its factorization.

20399198594 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27154.

The product of its (nonzero) digits is 6298560, while the sum is 59.

The spelling of 20399198594 in words is "twenty billion, three hundred ninety-nine million, one hundred ninety-eight thousand, five hundred ninety-four".