21002132030 has 128 divisors (see below), whose sum is σ = 46027837440. Its totient is φ = 6811776000.

The previous prime is 21002131987. The next prime is 21002132033. The reversal of 21002132030 is 3023120012.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21002131996 and 21002132014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21002132033) by changing a digit.

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 63 ways as a sum of consecutive naturals, for example, 2392850 + ... + 2401610.

It is an arithmetic number, because the mean of its divisors is an integer number (359592480).

Almost surely, 2^21002132030 is an apocalyptic number.

21002132030 is an abundant number, since it is smaller than the sum of its proper divisors (25025705410).

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

21002132030 is a wasteful number, since it uses less digits than its factorization.

21002132030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8866.

The product of its (nonzero) digits is 72, while the sum is 14.

Adding to 21002132030 its reverse (3023120012), we get a palindrome (24025252042).

The spelling of 21002132030 in words is "twenty-one billion, two million, one hundred thirty-two thousand, thirty".