20389468934 has 4 divisors (see below), whose sum is σ = 30584203404. Its totient is φ = 10194734466.

The previous prime is 20389468901. The next prime is 20389468969. The reversal of 20389468934 is 43986498302.

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

It is a self number, because there is not a number n which added to its sum of digits gives 20389468934.

It is a congruent number.

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 as a sum of consecutive naturals, namely, 5097367232 + ... + 5097367235.

It is an arithmetic number, because the mean of its divisors is an integer number (7646050851).

Almost surely, 2^20389468934 is an apocalyptic number.

20389468934 is a deficient number, since it is larger than the sum of its proper divisors (10194734470).

20389468934 is a wasteful number, since it uses less digits than its factorization.

20389468934 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10194734469.

The product of its (nonzero) digits is 8957952, while the sum is 56.

The spelling of 20389468934 in words is "twenty billion, three hundred eighty-nine million, four hundred sixty-eight thousand, nine hundred thirty-four".