20858678801 has 4 divisors (see below), whose sum is σ = 20864523504. Its totient is φ = 20852834100.

The previous prime is 20858678767. The next prime is 20858678837. The reversal of 20858678801 is 10887685802.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20858678801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20858678851) 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, 2916995 + ... + 2924136.

It is an arithmetic number, because the mean of its divisors is an integer number (5216130876).

Almost surely, 2^20858678801 is an apocalyptic number.

It is an amenable number.

20858678801 is a deficient number, since it is larger than the sum of its proper divisors (5844703).

20858678801 is an equidigital number, since it uses as much as digits as its factorization.

20858678801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5844702.

The product of its (nonzero) digits is 1720320, while the sum is 53.

The spelling of 20858678801 in words is "twenty billion, eight hundred fifty-eight million, six hundred seventy-eight thousand, eight hundred one".