21042230502 has 8 divisors (see below), whose sum is σ = 42084461016. Its totient is φ = 7014076832.

The previous prime is 21042230483. The next prime is 21042230507. The reversal of 21042230502 is 20503224012.

It is a sphenic number, since it is the product of 3 distinct primes.

21042230502 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21042230507) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1753519203 + ... + 1753519214.

It is an arithmetic number, because the mean of its divisors is an integer number (5260557627).

Almost surely, 2^21042230502 is an apocalyptic number.

21042230502 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21042230502 is a wasteful number, since it uses less digits than its factorization.

21042230502 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3507038422.

The product of its (nonzero) digits is 960, while the sum is 21.

Adding to 21042230502 its reverse (20503224012), we get a palindrome (41545454514).

The spelling of 21042230502 in words is "twenty-one billion, forty-two million, two hundred thirty thousand, five hundred two".