20782694399 has 8 divisors (see below), whose sum is σ = 22153440000. Its totient is φ = 19439640792.

The previous prime is 20782694353. The next prime is 20782694431. The reversal of 20782694399 is 99349628702.

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

It is a cyclic number.

It is not a de Polignac number, because 20782694399 - 2⁸ = 20782694143 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 (20782694099) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6921449 + ... + 6924450.

It is an arithmetic number, because the mean of its divisors is an integer number (2769180000).

Almost surely, 2^20782694399 is an apocalyptic number.

20782694399 is a deficient number, since it is larger than the sum of its proper divisors (1370745601).

20782694399 is a wasteful number, since it uses less digits than its factorization.

20782694399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13845997.

The product of its (nonzero) digits is 11757312, while the sum is 59.

The spelling of 20782694399 in words is "twenty billion, seven hundred eighty-two million, six hundred ninety-four thousand, three hundred ninety-nine".