20001513439 has 4 divisors (see below), whose sum is σ = 20002573800. Its totient is φ = 20000453080.

The previous prime is 20001513401. The next prime is 20001513449. The reversal of 20001513439 is 93431510002.

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

It is a cyclic number.

It is not a de Polignac number, because 20001513439 - 2¹³ = 20001505247 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20001513449) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 501364 + ... + 539785.

It is an arithmetic number, because the mean of its divisors is an integer number (5000643450).

Almost surely, 2^20001513439 is an apocalyptic number.

20001513439 is a deficient number, since it is larger than the sum of its proper divisors (1060361).

20001513439 is a wasteful number, since it uses less digits than its factorization.

20001513439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1060360.

The product of its (nonzero) digits is 3240, while the sum is 28.

The spelling of 20001513439 in words is "twenty billion, one million, five hundred thirteen thousand, four hundred thirty-nine".