20858678841 has 32 divisors (see below), whose sum is σ = 37341416448. Its totient is φ = 10002162240.

The previous prime is 20858678837. The next prime is 20858678851. The reversal of 20858678841 is 14887685802.

It is not a de Polignac number, because 20858678841 - 2² = 20858678837 is a prime.

It is a super-2 number, since 2×20858678841² (a number of 21 digits) contains 22 as substring.

It is a Curzon 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 31 ways as a sum of consecutive naturals, for example, 3469971 + ... + 3475976.

It is an arithmetic number, because the mean of its divisors is an integer number (1166919264).

Almost surely, 2^20858678841 is an apocalyptic number.

20858678841 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

20858678841 is a deficient number, since it is larger than the sum of its proper divisors (16482737607).

20858678841 is a wasteful number, since it uses less digits than its factorization.

20858678841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6945981.

The product of its (nonzero) digits is 6881280, while the sum is 57.

The spelling of 20858678841 in words is "twenty billion, eight hundred fifty-eight million, six hundred seventy-eight thousand, eight hundred forty-one".