21007282030 has 32 divisors (see below), whose sum is σ = 43505035200. Its totient is φ = 7154154240.

The previous prime is 21007282027. The next prime is 21007282031. The reversal of 21007282030 is 3028270012.

It is a junction number, because it is equal to n+sod(n) for n = 21007281986 and 21007282004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21007282031) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 996631 + ... + 1017490.

It is an arithmetic number, because the mean of its divisors is an integer number (1359532350).

Almost surely, 2^21007282030 is an apocalyptic number.

21007282030 is an abundant number, since it is smaller than the sum of its proper divisors (22497753170).

21007282030 is a wasteful number, since it uses less digits than its factorization.

21007282030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2014284.

The product of its (nonzero) digits is 1344, while the sum is 25.

The spelling of 21007282030 in words is "twenty-one billion, seven million, two hundred eighty-two thousand, thirty".