21310041502 has 4 divisors (see below), whose sum is σ = 31965062256. Its totient is φ = 10655020750.

The previous prime is 21310041491. The next prime is 21310041509. The reversal of 21310041502 is 20514001312.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 21310041502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21310041509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5327510374 + ... + 5327510377.

It is an arithmetic number, because the mean of its divisors is an integer number (7991265564).

Almost surely, 2^21310041502 is an apocalyptic number.

21310041502 is a deficient number, since it is larger than the sum of its proper divisors (10655020754).

21310041502 is a wasteful number, since it uses less digits than its factorization.

21310041502 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10655020753.

The product of its (nonzero) digits is 240, while the sum is 19.

Adding to 21310041502 its reverse (20514001312), we get a palindrome (41824042814).

The spelling of 21310041502 in words is "twenty-one billion, three hundred ten million, forty-one thousand, five hundred two".