21023022030 has 64 divisors (see below), whose sum is σ = 50986990080. Its totient is φ = 5547148416.

The previous prime is 21023022011. The next prime is 21023022047. The reversal of 21023022030 is 3022032012.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5526109 + ... + 5529911.

It is an arithmetic number, because the mean of its divisors is an integer number (796671720).

Almost surely, 2^21023022030 is an apocalyptic number.

21023022030 is an abundant number, since it is smaller than the sum of its proper divisors (29963968050).

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

21023022030 is a wasteful number, since it uses less digits than its factorization.

21023022030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5705.

The product of its (nonzero) digits is 144, while the sum is 15.

Adding to 21023022030 its reverse (3022032012), we get a palindrome (24045054042).

The spelling of 21023022030 in words is "twenty-one billion, twenty-three million, twenty-two thousand, thirty".