20389337534 has 4 divisors (see below), whose sum is σ = 30584006304. Its totient is φ = 10194668766.

The previous prime is 20389337533. The next prime is 20389337537. The reversal of 20389337534 is 43573398302.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20389337531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5097334382 + ... + 5097334385.

It is an arithmetic number, because the mean of its divisors is an integer number (7646001576).

Almost surely, 2^20389337534 is an apocalyptic number.

20389337534 is a deficient number, since it is larger than the sum of its proper divisors (10194668770).

20389337534 is a wasteful number, since it uses less digits than its factorization.

20389337534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10194668769.

The product of its (nonzero) digits is 1632960, while the sum is 47.

The spelling of 20389337534 in words is "twenty billion, three hundred eighty-nine million, three hundred thirty-seven thousand, five hundred thirty-four".