21030213498 has 64 divisors (see below), whose sum is σ = 50653194240. Its totient is φ = 5686293312.

The previous prime is 21030213481. The next prime is 21030213499. The reversal of 21030213498 is 89431203012.

It is a super-2 number, since 2×21030213498² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21030213499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 758040 + ... + 785292.

It is an arithmetic number, because the mean of its divisors is an integer number (791456160).

Almost surely, 2^21030213498 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21030213498, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25326597120).

21030213498 is an abundant number, since it is smaller than the sum of its proper divisors (29622980742).

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

21030213498 is a wasteful number, since it uses less digits than its factorization.

21030213498 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28251.

The product of its (nonzero) digits is 10368, while the sum is 33.

The spelling of 21030213498 in words is "twenty-one billion, thirty million, two hundred thirteen thousand, four hundred ninety-eight".