20861820367 has 8 divisors (see below), whose sum is σ = 21380914800. Its totient is φ = 20343215040.

The previous prime is 20861820319. The next prime is 20861820389. The reversal of 20861820367 is 76302816802.

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 20861820367 - 2²³ = 20853431759 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 (20861820307) 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, 35148 + ... + 207265.

It is an arithmetic number, because the mean of its divisors is an integer number (2672614350).

Almost surely, 2^20861820367 is an apocalyptic number.

20861820367 is a deficient number, since it is larger than the sum of its proper divisors (519094433).

20861820367 is a wasteful number, since it uses less digits than its factorization.

20861820367 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244553.

The product of its (nonzero) digits is 193536, while the sum is 43.

The spelling of 20861820367 in words is "twenty billion, eight hundred sixty-one million, eight hundred twenty thousand, three hundred sixty-seven".