21030680020 has 24 divisors (see below), whose sum is σ = 50473632384. Its totient is φ = 7210518816.

The previous prime is 21030679979. The next prime is 21030680029. The reversal of 21030680020 is 2008603012.

It is a junction number, because it is equal to n+sod(n) for n = 21030679973 and 21030680000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21030680029) 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, 75109432 + ... + 75109711.

It is an arithmetic number, because the mean of its divisors is an integer number (2103068016).

Almost surely, 2^21030680020 is an apocalyptic number.

21030680020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21030680020 is an abundant number, since it is smaller than the sum of its proper divisors (29442952364).

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

21030680020 is a wasteful number, since it uses less digits than its factorization.

21030680020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150219159 (or 150219157 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

The spelling of 21030680020 in words is "twenty-one billion, thirty million, six hundred eighty thousand, twenty".