21002306850030 has 128 divisors (see below), whose sum is σ = 55193920473600. Its totient is φ = 5072396175360.

The previous prime is 21002306850029. The next prime is 21002306850059. The reversal of 21002306850030 is 3005860320012.

It is a super-2 number, since 2×21002306850030² (a number of 27 digits) contains 22 as substring.

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

It is a self number, because there is not a number n which added to its sum of digits gives 21002306850030.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 492424146 + ... + 492466794.

It is an arithmetic number, because the mean of its divisors is an integer number (431202503700).

Almost surely, 2^{21002306850030} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21002306850030, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27596960236800).

21002306850030 is an abundant number, since it is smaller than the sum of its proper divisors (34191613623570).

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

21002306850030 is a wasteful number, since it uses less digits than its factorization.

21002306850030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48226.

The product of its (nonzero) digits is 8640, while the sum is 30.

The spelling of 21002306850030 in words is "twenty-one trillion, two billion, three hundred six million, eight hundred fifty thousand, thirty".