20004513399 has 12 divisors (see below), whose sum is σ = 31118132136. Its totient is φ = 12310469712.

The previous prime is 20004513329. The next prime is 20004513421. The reversal of 20004513399 is 99331540002.

It is a happy number.

It is not a de Polignac number, because 20004513399 - 2¹³ = 20004505207 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20004513329) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 85489257 + ... + 85489490.

It is an arithmetic number, because the mean of its divisors is an integer number (2593177678).

Almost surely, 2^20004513399 is an apocalyptic number.

20004513399 is a deficient number, since it is larger than the sum of its proper divisors (11113618737).

20004513399 is a wasteful number, since it uses less digits than its factorization.

20004513399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170978766 (or 170978763 counting only the distinct ones).

The product of its (nonzero) digits is 29160, while the sum is 36.

It can be divided in two parts, 200045 and 13399, that added together give a square (213444 = 462²).

The spelling of 20004513399 in words is "twenty billion, four million, five hundred thirteen thousand, three hundred ninety-nine".