20613004799 has 4 divisors (see below), whose sum is σ = 20672068200. Its totient is φ = 20553941400.

The previous prime is 20613004787. The next prime is 20613004831. The reversal of 20613004799 is 99740031602.

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 20613004799 - 2²⁰ = 20611956223 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 (20613004739) 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, 29531177 + ... + 29531874.

It is an arithmetic number, because the mean of its divisors is an integer number (5168017050).

Almost surely, 2^20613004799 is an apocalyptic number.

20613004799 is a deficient number, since it is larger than the sum of its proper divisors (59063401).

20613004799 is an equidigital number, since it uses as much as digits as its factorization.

20613004799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59063400.

The product of its (nonzero) digits is 81648, while the sum is 41.

The spelling of 20613004799 in words is "twenty billion, six hundred thirteen million, four thousand, seven hundred ninety-nine".