20992736413 has 4 divisors (see below), whose sum is σ = 22901167008. Its totient is φ = 19084305820.

The previous prime is 20992736357. The next prime is 20992736417. The reversal of 20992736413 is 31463729902.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20992736413 - 2⁹ = 20992735901 is a prime.

It is a super-2 number, since 2×20992736413² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20992736417) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 954215281 + ... + 954215302.

It is an arithmetic number, because the mean of its divisors is an integer number (5725291752).

Almost surely, 2^20992736413 is an apocalyptic number.

It is an amenable number.

20992736413 is a deficient number, since it is larger than the sum of its proper divisors (1908430595).

20992736413 is a wasteful number, since it uses less digits than its factorization.

20992736413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1908430594.

The product of its (nonzero) digits is 489888, while the sum is 46.

The spelling of 20992736413 in words is "twenty billion, nine hundred ninety-two million, seven hundred thirty-six thousand, four hundred thirteen".