21398330802 has 8 divisors (see below), whose sum is σ = 42796661616. Its totient is φ = 7132776932.

The previous prime is 21398330791. The next prime is 21398330809. The reversal of 21398330802 is 20803389312.

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

21398330802 is an admirable number.

It is a super-2 number, since 2×21398330802² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21398330809) 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, 1783194228 + ... + 1783194239.

It is an arithmetic number, because the mean of its divisors is an integer number (5349582702).

Almost surely, 2^21398330802 is an apocalyptic number.

21398330802 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.

21398330802 is a wasteful number, since it uses less digits than its factorization.

21398330802 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3566388472.

The product of its (nonzero) digits is 62208, while the sum is 39.

The spelling of 21398330802 in words is "twenty-one billion, three hundred ninety-eight million, three hundred thirty thousand, eight hundred two".