20913464247 has 8 divisors (see below), whose sum is σ = 30029589744. Its totient is φ = 12869824128.

The previous prime is 20913464233. The next prime is 20913464251. The reversal of 20913464247 is 74246431902.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20913464247 - 2²⁸ = 20645028791 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20913464199 and 20913464208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20913464287) 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 7 ways as a sum of consecutive naturals, for example, 268121298 + ... + 268121375.

It is an arithmetic number, because the mean of its divisors is an integer number (3753698718).

Almost surely, 2^20913464247 is an apocalyptic number.

20913464247 is a deficient number, since it is larger than the sum of its proper divisors (9116125497).

20913464247 is a wasteful number, since it uses less digits than its factorization.

20913464247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 536242689.

The product of its (nonzero) digits is 290304, while the sum is 42.

The spelling of 20913464247 in words is "twenty billion, nine hundred thirteen million, four hundred sixty-four thousand, two hundred forty-seven".