20702584019 has 4 divisors (see below), whose sum is σ = 22295090496. Its totient is φ = 19110077544.

The previous prime is 20702583973. The next prime is 20702584069. The reversal of 20702584019 is 91048520702.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20702584019 is a prime.

It is a super-2 number, since 2×20702584019² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20702584069) 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, 796253219 + ... + 796253244.

It is an arithmetic number, because the mean of its divisors is an integer number (5573772624).

Almost surely, 2^20702584019 is an apocalyptic number.

20702584019 is a deficient number, since it is larger than the sum of its proper divisors (1592506477).

20702584019 is a wasteful number, since it uses less digits than its factorization.

20702584019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1592506476.

The product of its (nonzero) digits is 40320, while the sum is 38.

The spelling of 20702584019 in words is "twenty billion, seven hundred two million, five hundred eighty-four thousand, nineteen".