20858130810 has 192 divisors, whose sum is σ = 61659636480. Its totient is φ = 4845603840.

The previous prime is 20858130793. The next prime is 20858130827. The reversal of 20858130810 is 1803185802.

It is an interprime number because it is at equal distance from previous prime (20858130793) and next prime (20858130827).

It is a super-2 number, since 2×20858130810² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 3930619 + ... + 3935921.

It is an arithmetic number, because the mean of its divisors is an integer number (321143940).

Almost surely, 2^20858130810 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20858130810, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30829818240).

20858130810 is an abundant number, since it is smaller than the sum of its proper divisors (40801505670).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20858130810 is a wasteful number, since it uses less digits than its factorization.

20858130810 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5493 (or 5490 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 36.

The spelling of 20858130810 in words is "twenty billion, eight hundred fifty-eight million, one hundred thirty thousand, eight hundred ten".