20789651279 has 8 divisors (see below), whose sum is σ = 21371889168. Its totient is φ = 20208484800.

The previous prime is 20789651273. The next prime is 20789651291. The reversal of 20789651279 is 97215698702.

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 20789651279 - 2²⁴ = 20772874063 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 (20789651273) 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, 228422 + ... + 306195.

It is an arithmetic number, because the mean of its divisors is an integer number (2671486146).

Almost surely, 2^20789651279 is an apocalyptic number.

20789651279 is a deficient number, since it is larger than the sum of its proper divisors (582237889).

20789651279 is a wasteful number, since it uses less digits than its factorization.

20789651279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 535705.

The product of its (nonzero) digits is 3810240, while the sum is 56.

The spelling of 20789651279 in words is "twenty billion, seven hundred eighty-nine million, six hundred fifty-one thousand, two hundred seventy-nine".