20394629899 has 8 divisors (see below), whose sum is σ = 23491678208. Its totient is φ = 17343464040.

The previous prime is 20394629873. The next prime is 20394629903. The reversal of 20394629899 is 99892649302.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20394629899 - 2⁵ = 20394629867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20394629839) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11469657 + ... + 11471434.

It is an arithmetic number, because the mean of its divisors is an integer number (2936459776).

Almost surely, 2^20394629899 is an apocalyptic number.

20394629899 is a deficient number, since it is larger than the sum of its proper divisors (3097048309).

20394629899 is a wasteful number, since it uses less digits than its factorization.

20394629899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22941225.

The product of its (nonzero) digits is 15116544, while the sum is 61.

The spelling of 20394629899 in words is "twenty billion, three hundred ninety-four million, six hundred twenty-nine thousand, eight hundred ninety-nine".