21416311502 has 8 divisors (see below), whose sum is σ = 32133070200. Its totient is φ = 10705288104.

The previous prime is 21416311481. The next prime is 21416311507. The reversal of 21416311502 is 20511361412.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21416311507) 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, 1424477 + ... + 1439432.

It is an arithmetic number, because the mean of its divisors is an integer number (4016633775).

Almost surely, 2^21416311502 is an apocalyptic number.

21416311502 is a deficient number, since it is larger than the sum of its proper divisors (10716758698).

21416311502 is a wasteful number, since it uses less digits than its factorization.

21416311502 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2867650.

The product of its (nonzero) digits is 1440, while the sum is 26.

Adding to 21416311502 its reverse (20511361412), we get a palindrome (41927672914).

The spelling of 21416311502 in words is "twenty-one billion, four hundred sixteen million, three hundred eleven thousand, five hundred two".