20858006100 has 36 divisors (see below), whose sum is σ = 60349165184. Its totient is φ = 5562134880.

The previous prime is 20858006089. The next prime is 20858006107. The reversal of 20858006100 is 160085802.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20858006107) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 34763044 + ... + 34763643.

Almost surely, 2^20858006100 is an apocalyptic number.

20858006100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20858006100 is an abundant number, since it is smaller than the sum of its proper divisors (39491159084).

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

20858006100 is a wasteful number, since it uses less digits than its factorization.

20858006100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69526704 (or 69526697 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 30.

The spelling of 20858006100 in words is "twenty billion, eight hundred fifty-eight million, six thousand, one hundred".