21202003230 has 32 divisors (see below), whose sum is σ = 52125903648. Its totient is φ = 5515968000.

The previous prime is 21202003223. The next prime is 21202003231. The reversal of 21202003230 is 3230020212.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21202003231) 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, 8617471 + ... + 8619930.

It is an arithmetic number, because the mean of its divisors is an integer number (1628934489).

Almost surely, 2^21202003230 is an apocalyptic number.

21202003230 is an abundant number, since it is smaller than the sum of its proper divisors (30923900418).

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

21202003230 is a wasteful number, since it uses less digits than its factorization.

21202003230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17237452.

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

Adding to 21202003230 its reverse (3230020212), we get a palindrome (24432023442).

The spelling of 21202003230 in words is "twenty-one billion, two hundred two million, three thousand, two hundred thirty".